diff --git a/http/handler/api/restream.go b/http/handler/api/restream.go
index c61f363a..ac750c23 100644
--- a/http/handler/api/restream.go
+++ b/http/handler/api/restream.go
@@ -61,7 +61,7 @@ func (h *RestreamHandler) Add(c echo.Context) error {
 		return api.Err(http.StatusBadRequest, "Invalid process config", "%s", err.Error())
 	}
 
-	p, _ := h.getProcess(config.ID, "config")
+	p, _ := h.getProcess(config.ID, config.Owner, config.Group, "config")
 
 	return c.JSON(http.StatusOK, p.Config)
 }
@@ -88,14 +88,16 @@ func (h *RestreamHandler) GetAll(c echo.Context) error {
 	})
 	idpattern := util.DefaultQuery(c, "idpattern", "")
 	refpattern := util.DefaultQuery(c, "refpattern", "")
+	user := util.DefaultContext(c, "user", "")
+	group := util.DefaultQuery(c, "group", "")
 
-	ids := h.restream.GetProcessIDs(idpattern, refpattern)
+	ids := h.restream.GetProcessIDs(idpattern, refpattern, user, group)
 
 	processes := []api.Process{}
 
 	if len(wantids) == 0 || len(reference) != 0 {
 		for _, id := range ids {
-			if p, err := h.getProcess(id, filter); err == nil {
+			if p, err := h.getProcess(id, user, group, filter); err == nil {
 				if len(reference) != 0 && p.Reference != reference {
 					continue
 				}
@@ -106,7 +108,7 @@ func (h *RestreamHandler) GetAll(c echo.Context) error {
 		for _, id := range ids {
 			for _, wantid := range wantids {
 				if wantid == id {
-					if p, err := h.getProcess(id, filter); err == nil {
+					if p, err := h.getProcess(id, user, group, filter); err == nil {
 						processes = append(processes, p)
 					}
 				}
@@ -132,8 +134,10 @@ func (h *RestreamHandler) GetAll(c echo.Context) error {
 func (h *RestreamHandler) Get(c echo.Context) error {
 	id := util.PathParam(c, "id")
 	filter := util.DefaultQuery(c, "filter", "")
+	user := util.DefaultContext(c, "user", "")
+	group := util.DefaultQuery(c, "group", "")
 
-	p, err := h.getProcess(id, filter)
+	p, err := h.getProcess(id, user, group, filter)
 	if err != nil {
 		return api.Err(http.StatusNotFound, "Unknown process ID", "%s", err)
 	}
@@ -154,12 +158,14 @@ func (h *RestreamHandler) Get(c echo.Context) error {
 // @Router /api/v3/process/{id} [delete]
 func (h *RestreamHandler) Delete(c echo.Context) error {
 	id := util.PathParam(c, "id")
+	user := util.DefaultContext(c, "user", "")
+	group := util.DefaultQuery(c, "group", "")
 
-	if err := h.restream.StopProcess(id); err != nil {
+	if err := h.restream.StopProcess(id, user, group); err != nil {
 		return api.Err(http.StatusNotFound, "Unknown process ID", "%s", err)
 	}
 
-	if err := h.restream.DeleteProcess(id); err != nil {
+	if err := h.restream.DeleteProcess(id, user, group); err != nil {
 		return api.Err(http.StatusInternalServerError, "Process can't be deleted", "%s", err)
 	}
 
@@ -182,6 +188,8 @@ func (h *RestreamHandler) Delete(c echo.Context) error {
 // @Router /api/v3/process/{id} [put]
 func (h *RestreamHandler) Update(c echo.Context) error {
 	id := util.PathParam(c, "id")
+	user := util.DefaultContext(c, "user", "")
+	group := util.DefaultQuery(c, "group", "")
 
 	process := api.ProcessConfig{
 		ID:        id,
@@ -189,7 +197,7 @@ func (h *RestreamHandler) Update(c echo.Context) error {
 		Autostart: true,
 	}
 
-	current, err := h.restream.GetProcess(id)
+	current, err := h.restream.GetProcess(id, user, group)
 	if err != nil {
 		return api.Err(http.StatusNotFound, "Process not found", "%s", id)
 	}
@@ -203,7 +211,7 @@ func (h *RestreamHandler) Update(c echo.Context) error {
 
 	config := process.Marshal()
 
-	if err := h.restream.UpdateProcess(id, config); err != nil {
+	if err := h.restream.UpdateProcess(id, user, group, config); err != nil {
 		if err == restream.ErrUnknownProcess {
 			return api.Err(http.StatusNotFound, "Process not found", "%s", id)
 		}
@@ -211,7 +219,7 @@ func (h *RestreamHandler) Update(c echo.Context) error {
 		return api.Err(http.StatusBadRequest, "Process can't be updated", "%s", err)
 	}
 
-	p, _ := h.getProcess(config.ID, "config")
+	p, _ := h.getProcess(config.ID, config.Owner, config.Group, "config")
 
 	return c.JSON(http.StatusOK, p.Config)
 }
@@ -232,6 +240,8 @@ func (h *RestreamHandler) Update(c echo.Context) error {
 // @Router /api/v3/process/{id}/command [put]
 func (h *RestreamHandler) Command(c echo.Context) error {
 	id := util.PathParam(c, "id")
+	user := util.DefaultContext(c, "user", "")
+	group := util.DefaultQuery(c, "group", "")
 
 	var command api.Command
 
@@ -241,13 +251,13 @@ func (h *RestreamHandler) Command(c echo.Context) error {
 
 	var err error
 	if command.Command == "start" {
-		err = h.restream.StartProcess(id)
+		err = h.restream.StartProcess(id, user, group)
 	} else if command.Command == "stop" {
-		err = h.restream.StopProcess(id)
+		err = h.restream.StopProcess(id, user, group)
 	} else if command.Command == "restart" {
-		err = h.restream.RestartProcess(id)
+		err = h.restream.RestartProcess(id, user, group)
 	} else if command.Command == "reload" {
-		err = h.restream.ReloadProcess(id)
+		err = h.restream.ReloadProcess(id, user, group)
 	} else {
 		return api.Err(http.StatusBadRequest, "Unknown command provided", "Known commands are: start, stop, reload, restart")
 	}
@@ -273,8 +283,10 @@ func (h *RestreamHandler) Command(c echo.Context) error {
 // @Router /api/v3/process/{id}/config [get]
 func (h *RestreamHandler) GetConfig(c echo.Context) error {
 	id := util.PathParam(c, "id")
+	user := util.DefaultContext(c, "user", "")
+	group := util.DefaultQuery(c, "group", "")
 
-	p, err := h.restream.GetProcess(id)
+	p, err := h.restream.GetProcess(id, user, group)
 	if err != nil {
 		return api.Err(http.StatusNotFound, "Unknown process ID", "%s", err)
 	}
@@ -299,8 +311,10 @@ func (h *RestreamHandler) GetConfig(c echo.Context) error {
 // @Router /api/v3/process/{id}/state [get]
 func (h *RestreamHandler) GetState(c echo.Context) error {
 	id := util.PathParam(c, "id")
+	user := util.DefaultContext(c, "user", "")
+	group := util.DefaultQuery(c, "group", "")
 
-	s, err := h.restream.GetProcessState(id)
+	s, err := h.restream.GetProcessState(id, user, group)
 	if err != nil {
 		return api.Err(http.StatusNotFound, "Unknown process ID", "%s", err)
 	}
@@ -325,8 +339,10 @@ func (h *RestreamHandler) GetState(c echo.Context) error {
 // @Router /api/v3/process/{id}/report [get]
 func (h *RestreamHandler) GetReport(c echo.Context) error {
 	id := util.PathParam(c, "id")
+	user := util.DefaultContext(c, "user", "")
+	group := util.DefaultQuery(c, "group", "")
 
-	l, err := h.restream.GetProcessLog(id)
+	l, err := h.restream.GetProcessLog(id, user, group)
 	if err != nil {
 		return api.Err(http.StatusNotFound, "Unknown process ID", "%s", err)
 	}
@@ -349,8 +365,10 @@ func (h *RestreamHandler) GetReport(c echo.Context) error {
 // @Router /api/v3/process/{id}/probe [get]
 func (h *RestreamHandler) Probe(c echo.Context) error {
 	id := util.PathParam(c, "id")
+	user := util.DefaultContext(c, "user", "")
+	group := util.DefaultQuery(c, "group", "")
 
-	probe := h.restream.Probe(id)
+	probe := h.restream.Probe(id, user, group)
 
 	apiprobe := api.Probe{}
 	apiprobe.Unmarshal(&probe)
@@ -411,8 +429,10 @@ func (h *RestreamHandler) ReloadSkills(c echo.Context) error {
 func (h *RestreamHandler) GetProcessMetadata(c echo.Context) error {
 	id := util.PathParam(c, "id")
 	key := util.PathParam(c, "key")
+	user := util.DefaultContext(c, "user", "")
+	group := util.DefaultQuery(c, "group", "")
 
-	data, err := h.restream.GetProcessMetadata(id, key)
+	data, err := h.restream.GetProcessMetadata(id, user, group, key)
 	if err != nil {
 		return api.Err(http.StatusNotFound, "Unknown process ID", "%s", err)
 	}
@@ -437,6 +457,8 @@ func (h *RestreamHandler) GetProcessMetadata(c echo.Context) error {
 func (h *RestreamHandler) SetProcessMetadata(c echo.Context) error {
 	id := util.PathParam(c, "id")
 	key := util.PathParam(c, "key")
+	user := util.DefaultContext(c, "user", "")
+	group := util.DefaultQuery(c, "group", "")
 
 	if len(key) == 0 {
 		return api.Err(http.StatusBadRequest, "Invalid key", "The key must not be of length 0")
@@ -448,7 +470,7 @@ func (h *RestreamHandler) SetProcessMetadata(c echo.Context) error {
 		return api.Err(http.StatusBadRequest, "Invalid JSON", "%s", err)
 	}
 
-	if err := h.restream.SetProcessMetadata(id, key, data); err != nil {
+	if err := h.restream.SetProcessMetadata(id, key, user, group, data); err != nil {
 		return api.Err(http.StatusNotFound, "Unknown process ID", "%s", err)
 	}
 
@@ -510,7 +532,7 @@ func (h *RestreamHandler) SetMetadata(c echo.Context) error {
 	return c.JSON(http.StatusOK, data)
 }
 
-func (h *RestreamHandler) getProcess(id, filterString string) (api.Process, error) {
+func (h *RestreamHandler) getProcess(id, user, group, filterString string) (api.Process, error) {
 	filter := strings.FieldsFunc(filterString, func(r rune) bool {
 		return r == rune(',')
 	})
@@ -534,7 +556,7 @@ func (h *RestreamHandler) getProcess(id, filterString string) (api.Process, erro
 		}
 	}
 
-	process, err := h.restream.GetProcess(id)
+	process, err := h.restream.GetProcess(id, user, group)
 	if err != nil {
 		return api.Process{}, err
 	}
@@ -552,21 +574,21 @@ func (h *RestreamHandler) getProcess(id, filterString string) (api.Process, erro
 	}
 
 	if wants["state"] {
-		if state, err := h.restream.GetProcessState(id); err == nil {
+		if state, err := h.restream.GetProcessState(id, user, group); err == nil {
 			info.State = &api.ProcessState{}
 			info.State.Unmarshal(state)
 		}
 	}
 
 	if wants["report"] {
-		if log, err := h.restream.GetProcessLog(id); err == nil {
+		if log, err := h.restream.GetProcessLog(id, user, group); err == nil {
 			info.Report = &api.ProcessReport{}
 			info.Report.Unmarshal(log)
 		}
 	}
 
 	if wants["metadata"] {
-		if data, err := h.restream.GetProcessMetadata(id, ""); err == nil {
+		if data, err := h.restream.GetProcessMetadata(id, "", user, group); err == nil {
 			info.Metadata = api.NewMetadata(data)
 		}
 	}
diff --git a/http/handler/util/util.go b/http/handler/util/util.go
index fbbcd2fd..5219aa59 100644
--- a/http/handler/util/util.go
+++ b/http/handler/util/util.go
@@ -76,3 +76,12 @@ func DefaultQuery(c echo.Context, name, defValue string) string {
 
 	return param
 }
+
+func DefaultContext(c echo.Context, name, defValue string) string {
+	value, ok := c.Get(name).(string)
+	if !ok {
+		return defValue
+	}
+
+	return value
+}
diff --git a/iam/identity.go b/iam/identity.go
index c9c500d8..39c80ff8 100644
--- a/iam/identity.go
+++ b/iam/identity.go
@@ -370,6 +370,10 @@ func NewIdentityManager(config IdentityConfig) (IdentityManager, error) {
 		im.logger = log.New("")
 	}
 
+	if im.fs == nil {
+		return nil, fmt.Errorf("no filesystem provided")
+	}
+
 	err := im.load(im.filePath)
 	if err != nil {
 		return nil, err
@@ -552,10 +556,6 @@ func (im *identityManager) Rename(oldname, newname string) error {
 }
 
 func (im *identityManager) load(filePath string) error {
-	if im.fs == nil {
-		return fmt.Errorf("no filesystem provided")
-	}
-
 	if _, err := im.fs.Stat(filePath); os.IsNotExist(err) {
 		return nil
 	}
@@ -587,10 +587,6 @@ func (im *identityManager) Save() error {
 }
 
 func (im *identityManager) save(filePath string) error {
-	if im.fs == nil {
-		return fmt.Errorf("no filesystem provided")
-	}
-
 	if filePath == "" {
 		return fmt.Errorf("invalid file path, file path cannot be empty")
 	}
diff --git a/monitor/restream.go b/monitor/restream.go
index cfd069f4..300f5dc5 100644
--- a/monitor/restream.go
+++ b/monitor/restream.go
@@ -57,15 +57,15 @@ func (c *restreamCollector) Collect() metric.Metrics {
 		"starting":  0,
 	}
 
-	ids := c.r.GetProcessIDs("", "")
+	ids := c.r.GetProcessIDs("", "", "$superuser", "$none")
 
 	for _, id := range ids {
-		state, _ := c.r.GetProcessState(id)
+		state, _ := c.r.GetProcessState(id, "$superuser", "$none")
 		if state == nil {
 			continue
 		}
 
-		proc, _ := c.r.GetProcess(id)
+		proc, _ := c.r.GetProcess(id, "$superuser", "$none")
 		if proc == nil {
 			continue
 		}
diff --git a/restream/app/process.go b/restream/app/process.go
index 4ec6036a..7be919f2 100644
--- a/restream/app/process.go
+++ b/restream/app/process.go
@@ -36,6 +36,8 @@ func (io ConfigIO) Clone() ConfigIO {
 type Config struct {
 	ID             string     `json:"id"`
 	Reference      string     `json:"reference"`
+	Owner          string     `json:"owner"`
+	Group          string     `json:"group"`
 	FFVersion      string     `json:"ffversion"`
 	Input          []ConfigIO `json:"input"`
 	Output         []ConfigIO `json:"output"`
@@ -103,6 +105,8 @@ func (config *Config) CreateCommand() []string {
 
 type Process struct {
 	ID        string  `json:"id"`
+	Owner     string  `json:"owner"`
+	Group     string  `json:"group"`
 	Reference string  `json:"reference"`
 	Config    *Config `json:"config"`
 	CreatedAt int64   `json:"created_at"`
diff --git a/restream/restream.go b/restream/restream.go
index fcf38999..847225cf 100644
--- a/restream/restream.go
+++ b/restream/restream.go
@@ -15,6 +15,7 @@ import (
 	"github.com/datarhei/core/v16/ffmpeg/parse"
 	"github.com/datarhei/core/v16/ffmpeg/skills"
 	"github.com/datarhei/core/v16/glob"
+	"github.com/datarhei/core/v16/iam"
 	"github.com/datarhei/core/v16/io/fs"
 	"github.com/datarhei/core/v16/log"
 	"github.com/datarhei/core/v16/net"
@@ -30,31 +31,33 @@ import (
 
 // The Restreamer interface
 type Restreamer interface {
-	ID() string                                                  // ID of this instance
-	Name() string                                                // Arbitrary name of this instance
-	CreatedAt() time.Time                                        // Time of when this instance has been created
-	Start()                                                      // Start all processes that have a "start" order
-	Stop()                                                       // Stop all running process but keep their "start" order
-	AddProcess(config *app.Config) error                         // Add a new process
-	GetProcessIDs(idpattern, refpattern string) []string         // Get a list of process IDs based on patterns for ID and reference
-	DeleteProcess(id string) error                               // Delete a process
-	UpdateProcess(id string, config *app.Config) error           // Update a process
-	StartProcess(id string) error                                // Start a process
-	StopProcess(id string) error                                 // Stop a process
-	RestartProcess(id string) error                              // Restart a process
-	ReloadProcess(id string) error                               // Reload a process
-	GetProcess(id string) (*app.Process, error)                  // Get a process
-	GetProcessState(id string) (*app.State, error)               // Get the state of a process
-	GetProcessLog(id string) (*app.Log, error)                   // Get the logs of a process
-	GetPlayout(id, inputid string) (string, error)               // Get the URL of the playout API for a process
-	Probe(id string) app.Probe                                   // Probe a process
-	ProbeWithTimeout(id string, timeout time.Duration) app.Probe // Probe a process with specific timeout
-	Skills() skills.Skills                                       // Get the ffmpeg skills
-	ReloadSkills() error                                         // Reload the ffmpeg skills
-	SetProcessMetadata(id, key string, data interface{}) error   // Set metatdata to a process
-	GetProcessMetadata(id, key string) (interface{}, error)      // Get previously set metadata from a process
-	SetMetadata(key string, data interface{}) error              // Set general metadata
-	GetMetadata(key string) (interface{}, error)                 // Get previously set general metadata
+	ID() string           // ID of this instance
+	Name() string         // Arbitrary name of this instance
+	CreatedAt() time.Time // Time of when this instance has been created
+	Start()               // Start all processes that have a "start" order
+	Stop()                // Stop all running process but keep their "start" order
+
+	Skills() skills.Skills                          // Get the ffmpeg skills
+	ReloadSkills() error                            // Reload the ffmpeg skills
+	SetMetadata(key string, data interface{}) error // Set general metadata
+	GetMetadata(key string) (interface{}, error)    // Get previously set general metadata
+
+	AddProcess(config *app.Config) error                                      // Add a new process
+	GetProcessIDs(idpattern, refpattern, user, group string) []string         // Get a list of process IDs based on patterns for ID and reference
+	DeleteProcess(id, user, group string) error                               // Delete a process
+	UpdateProcess(id, user, group string, config *app.Config) error           // Update a process
+	StartProcess(id, user, group string) error                                // Start a process
+	StopProcess(id, user, group string) error                                 // Stop a process
+	RestartProcess(id, user, group string) error                              // Restart a process
+	ReloadProcess(id, user, group string) error                               // Reload a process
+	GetProcess(id, user, group string) (*app.Process, error)                  // Get a process
+	GetProcessState(id, user, group string) (*app.State, error)               // Get the state of a process
+	GetProcessLog(id, user, group string) (*app.Log, error)                   // Get the logs of a process
+	GetPlayout(id, user, group, inputid string) (string, error)               // Get the URL of the playout API for a process
+	Probe(id, user, group string) app.Probe                                   // Probe a process
+	ProbeWithTimeout(id, user, group string, timeout time.Duration) app.Probe // Probe a process with specific timeout
+	SetProcessMetadata(id, user, group, key string, data interface{}) error   // Set metatdata to a process
+	GetProcessMetadata(id, user, group, key string) (interface{}, error)      // Get previously set metadata from a process
 }
 
 // Config is the required configuration for a new restreamer instance.
@@ -67,11 +70,14 @@ type Config struct {
 	FFmpeg       ffmpeg.FFmpeg
 	MaxProcesses int64
 	Logger       log.Logger
+	IAM          iam.IAM
 }
 
 type task struct {
 	valid     bool
 	id        string // ID of the task/process
+	owner     string
+	group     string
 	reference string
 	process   *app.Process
 	config    *app.Config
@@ -84,6 +90,14 @@ type task struct {
 	metadata  map[string]interface{}
 }
 
+func newTaskid(id, group string) string {
+	return id + "~" + group
+}
+
+func (t *task) String() string {
+	return newTaskid(t.id, t.group)
+}
+
 type restream struct {
 	id        string
 	name      string
@@ -106,6 +120,8 @@ type restream struct {
 
 	startOnce sync.Once
 	stopOnce  sync.Once
+
+	iam iam.IAM
 }
 
 // New returns a new instance that implements the Restreamer interface
@@ -117,12 +133,17 @@ func New(config Config) (Restreamer, error) {
 		store:     config.Store,
 		replace:   config.Replace,
 		logger:    config.Logger,
+		iam:       config.IAM,
 	}
 
 	if r.logger == nil {
 		r.logger = log.New("")
 	}
 
+	if r.iam == nil {
+		return nil, fmt.Errorf("missing IAM")
+	}
+
 	if r.store == nil {
 		dummyfs, _ := fs.NewMemFilesystem(fs.MemConfig{})
 		s, err := store.NewJSON(store.JSONConfig{
@@ -281,27 +302,33 @@ func (r *restream) load() error {
 		ffversion = fmt.Sprintf("%d.%d.0", v.Major(), v.Minor())
 	}
 
-	for id, process := range data.Process {
+	for _, process := range data.Process {
 		if len(process.Config.FFVersion) == 0 {
 			process.Config.FFVersion = "^" + ffversion
 		}
 
 		t := &task{
-			id:        id,
+			id:        process.ID,
+			owner:     process.Owner,
+			group:     process.Group,
 			reference: process.Reference,
 			process:   process,
 			config:    process.Config.Clone(),
-			logger:    r.logger.WithField("id", id),
+			logger: r.logger.WithFields(log.Fields{
+				"id":    process.ID,
+				"owner": process.Owner,
+				"group": process.Group,
+			}),
 		}
 
 		// Replace all placeholders in the config
 		resolvePlaceholders(t.config, r.replace)
 
-		tasks[id] = t
+		tasks[t.String()] = t
 	}
 
-	for id, userdata := range data.Metadata.Process {
-		t, ok := tasks[id]
+	for tid, userdata := range data.Metadata.Process {
+		t, ok := tasks[tid]
 		if !ok {
 			continue
 		}
@@ -312,44 +339,48 @@ func (r *restream) load() error {
 	// Now that all tasks are defined and all placeholders are
 	// replaced, we can resolve references and validate the
 	// inputs and outputs.
-	for _, t := range tasks {
+	for tid, t := range tasks {
 		// Just warn if the ffmpeg version constraint doesn't match the available ffmpeg version
 		if c, err := semver.NewConstraint(t.config.FFVersion); err == nil {
 			if v, err := semver.NewVersion(skills.FFmpeg.Version); err == nil {
 				if !c.Check(v) {
-					r.logger.Warn().WithFields(log.Fields{
-						"id":         t.id,
+					t.logger.Warn().WithFields(log.Fields{
 						"constraint": t.config.FFVersion,
 						"version":    skills.FFmpeg.Version,
 					}).WithError(fmt.Errorf("available FFmpeg version doesn't fit constraint; you have to update this process to adjust the constraint")).Log("")
 				}
 			} else {
-				r.logger.Warn().WithField("id", t.id).WithError(err).Log("")
+				t.logger.Warn().WithError(err).Log("")
 			}
 		} else {
-			r.logger.Warn().WithField("id", t.id).WithError(err).Log("")
+			t.logger.Warn().WithError(err).Log("")
+		}
+
+		if !r.enforce(t.owner, t.group, t.id, "CREATE") {
+			t.logger.Warn().WithError(fmt.Errorf("forbidden")).Log("Ignoring")
+			continue
 		}
 
 		err := r.resolveAddresses(tasks, t.config)
 		if err != nil {
-			r.logger.Warn().WithField("id", t.id).WithError(err).Log("Ignoring")
+			t.logger.Warn().WithError(err).Log("Ignoring")
 			continue
 		}
 
 		t.usesDisk, err = r.validateConfig(t.config)
 		if err != nil {
-			r.logger.Warn().WithField("id", t.id).WithError(err).Log("Ignoring")
+			t.logger.Warn().WithError(err).Log("Ignoring")
 			continue
 		}
 
 		err = r.setPlayoutPorts(t)
 		if err != nil {
-			r.logger.Warn().WithField("id", t.id).WithError(err).Log("Ignoring")
+			t.logger.Warn().WithError(err).Log("Ignoring")
 			continue
 		}
 
 		t.command = t.config.CreateCommand()
-		t.parser = r.ffmpeg.NewProcessParser(t.logger, t.id, t.reference)
+		t.parser = r.ffmpeg.NewProcessParser(t.logger, tid, t.reference)
 
 		ffmpeg, err := r.ffmpeg.New(ffmpeg.ProcessConfig{
 			Reconnect:      t.config.Reconnect,
@@ -376,15 +407,29 @@ func (r *restream) load() error {
 func (r *restream) save() {
 	data := store.NewStoreData()
 
-	for id, t := range r.tasks {
-		data.Process[id] = t.process
+	for tid, t := range r.tasks {
+		data.Process[tid] = t.process
 		data.Metadata.System = r.metadata
-		data.Metadata.Process[id] = t.metadata
+		data.Metadata.Process[tid] = t.metadata
 	}
 
 	r.store.Store(data)
 }
 
+func (r *restream) enforce(name, group, processid, action string) bool {
+	if len(name) == 0 {
+		name = "$anon"
+	}
+
+	if len(group) == 0 {
+		group = "$none"
+	}
+
+	ok, _ := r.iam.Enforce(name, group, "process:"+processid, action)
+
+	return ok
+}
+
 func (r *restream) ID() string {
 	return r.id
 }
@@ -398,9 +443,15 @@ func (r *restream) CreatedAt() time.Time {
 }
 
 var ErrUnknownProcess = errors.New("unknown process")
+var ErrUnknownProcessGroup = errors.New("unknown process group")
 var ErrProcessExists = errors.New("process already exists")
+var ErrForbidden = errors.New("forbidden")
 
 func (r *restream) AddProcess(config *app.Config) error {
+	if !r.enforce(config.Owner, config.Group, config.ID, "CREATE") {
+		return ErrForbidden
+	}
+
 	r.lock.RLock()
 	t, err := r.createTask(config)
 	r.lock.RUnlock()
@@ -412,20 +463,22 @@ func (r *restream) AddProcess(config *app.Config) error {
 	r.lock.Lock()
 	defer r.lock.Unlock()
 
-	_, ok := r.tasks[t.id]
+	tid := t.String()
+
+	_, ok := r.tasks[tid]
 	if ok {
 		return ErrProcessExists
 	}
 
-	r.tasks[t.id] = t
+	r.tasks[tid] = t
 
 	// set filesystem cleanup rules
-	r.setCleanup(t.id, t.config)
+	r.setCleanup(tid, t.config)
 
 	if t.process.Order == "start" {
-		err := r.startProcess(t.id)
+		err := r.startProcess(tid)
 		if err != nil {
-			delete(r.tasks, t.id)
+			delete(r.tasks, tid)
 			return err
 		}
 	}
@@ -450,6 +503,7 @@ func (r *restream) createTask(config *app.Config) (*task, error) {
 
 	process := &app.Process{
 		ID:        config.ID,
+		Group:     config.Group,
 		Reference: config.Reference,
 		Config:    config.Clone(),
 		Order:     "stop",
@@ -462,10 +516,14 @@ func (r *restream) createTask(config *app.Config) (*task, error) {
 
 	t := &task{
 		id:        config.ID,
+		group:     config.Group,
 		reference: process.Reference,
 		process:   process,
 		config:    process.Config.Clone(),
-		logger:    r.logger.WithField("id", process.ID),
+		logger: r.logger.WithFields(log.Fields{
+			"id":    process.ID,
+			"group": process.Group,
+		}),
 	}
 
 	resolvePlaceholders(t.config, r.replace)
@@ -486,7 +544,7 @@ func (r *restream) createTask(config *app.Config) (*task, error) {
 	}
 
 	t.command = t.config.CreateCommand()
-	t.parser = r.ffmpeg.NewProcessParser(t.logger, t.id, t.reference)
+	t.parser = r.ffmpeg.NewProcessParser(t.logger, t.String(), t.reference)
 
 	ffmpeg, err := r.ffmpeg.New(ffmpeg.ProcessConfig{
 		Reconnect:      t.config.Reconnect,
@@ -853,7 +911,11 @@ func (r *restream) resolveAddress(tasks map[string]*task, id, address string) (s
 	return address, fmt.Errorf("the process '%s' has no outputs with the ID '%s' (%s)", matches[1], matches[2], address)
 }
 
-func (r *restream) UpdateProcess(id string, config *app.Config) error {
+func (r *restream) UpdateProcess(id, user, group string, config *app.Config) error {
+	if !r.enforce(user, group, id, "UPDATE") {
+		return ErrForbidden
+	}
+
 	r.lock.Lock()
 	defer r.lock.Unlock()
 
@@ -862,35 +924,39 @@ func (r *restream) UpdateProcess(id string, config *app.Config) error {
 		return err
 	}
 
-	task, ok := r.tasks[id]
+	tid := newTaskid(id, group)
+
+	task, ok := r.tasks[tid]
 	if !ok {
 		return ErrUnknownProcess
 	}
 
 	t.process.Order = task.process.Order
 
-	if id != t.id {
-		_, ok := r.tasks[t.id]
+	if tid != t.String() {
+		_, ok := r.tasks[t.String()]
 		if ok {
 			return ErrProcessExists
 		}
 	}
 
-	if err := r.stopProcess(id); err != nil {
+	if err := r.stopProcess(tid); err != nil {
 		return err
 	}
 
-	if err := r.deleteProcess(id); err != nil {
+	if err := r.deleteProcess(tid); err != nil {
 		return err
 	}
 
-	r.tasks[t.id] = t
+	tid = t.String()
+
+	r.tasks[tid] = t
 
 	// set filesystem cleanup rules
-	r.setCleanup(t.id, t.config)
+	r.setCleanup(tid, t.config)
 
 	if t.process.Order == "start" {
-		r.startProcess(t.id)
+		r.startProcess(tid)
 	}
 
 	r.save()
@@ -898,17 +964,23 @@ func (r *restream) UpdateProcess(id string, config *app.Config) error {
 	return nil
 }
 
-func (r *restream) GetProcessIDs(idpattern, refpattern string) []string {
+func (r *restream) GetProcessIDs(idpattern, refpattern, user, group string) []string {
 	r.lock.RLock()
 	defer r.lock.RUnlock()
 
 	if len(idpattern) == 0 && len(refpattern) == 0 {
-		ids := make([]string, len(r.tasks))
-		i := 0
+		ids := []string{}
 
-		for id := range r.tasks {
-			ids[i] = id
-			i++
+		for _, t := range r.tasks {
+			if t.group != group {
+				continue
+			}
+
+			if !r.enforce(user, group, t.id, "GET") {
+				continue
+			}
+
+			ids = append(ids, t.id)
 		}
 
 		return ids
@@ -918,8 +990,16 @@ func (r *restream) GetProcessIDs(idpattern, refpattern string) []string {
 	count := 0
 
 	if len(idpattern) != 0 {
-		for id := range r.tasks {
-			match, err := glob.Match(idpattern, id)
+		for _, t := range r.tasks {
+			if t.group != group {
+				continue
+			}
+
+			if !r.enforce(user, group, t.id, "GET") {
+				continue
+			}
+
+			match, err := glob.Match(idpattern, t.id)
 			if err != nil {
 				return nil
 			}
@@ -928,7 +1008,7 @@ func (r *restream) GetProcessIDs(idpattern, refpattern string) []string {
 				continue
 			}
 
-			idmap[id]++
+			idmap[t.id]++
 		}
 
 		count++
@@ -936,6 +1016,14 @@ func (r *restream) GetProcessIDs(idpattern, refpattern string) []string {
 
 	if len(refpattern) != 0 {
 		for _, t := range r.tasks {
+			if t.group != group {
+				continue
+			}
+
+			if !r.enforce(user, group, t.id, "GET") {
+				continue
+			}
+
 			match, err := glob.Match(refpattern, t.reference)
 			if err != nil {
 				return nil
@@ -964,11 +1052,17 @@ func (r *restream) GetProcessIDs(idpattern, refpattern string) []string {
 	return ids
 }
 
-func (r *restream) GetProcess(id string) (*app.Process, error) {
+func (r *restream) GetProcess(id, user, group string) (*app.Process, error) {
+	if !r.enforce(user, group, id, "GET") {
+		return nil, ErrForbidden
+	}
+
+	tid := newTaskid(id, group)
+
 	r.lock.RLock()
 	defer r.lock.RUnlock()
 
-	task, ok := r.tasks[id]
+	task, ok := r.tasks[tid]
 	if !ok {
 		return &app.Process{}, ErrUnknownProcess
 	}
@@ -978,11 +1072,17 @@ func (r *restream) GetProcess(id string) (*app.Process, error) {
 	return process, nil
 }
 
-func (r *restream) DeleteProcess(id string) error {
+func (r *restream) DeleteProcess(id, user, group string) error {
+	if !r.enforce(user, group, id, "DELETE") {
+		return ErrForbidden
+	}
+
+	tid := newTaskid(id, group)
+
 	r.lock.Lock()
 	defer r.lock.Unlock()
 
-	err := r.deleteProcess(id)
+	err := r.deleteProcess(tid)
 	if err != nil {
 		return err
 	}
@@ -992,29 +1092,35 @@ func (r *restream) DeleteProcess(id string) error {
 	return nil
 }
 
-func (r *restream) deleteProcess(id string) error {
-	task, ok := r.tasks[id]
+func (r *restream) deleteProcess(tid string) error {
+	task, ok := r.tasks[tid]
 	if !ok {
 		return ErrUnknownProcess
 	}
 
 	if task.process.Order != "stop" {
-		return fmt.Errorf("the process with the ID '%s' is still running", id)
+		return fmt.Errorf("the process with the ID '%s' is still running", task.id)
 	}
 
 	r.unsetPlayoutPorts(task)
-	r.unsetCleanup(id)
+	r.unsetCleanup(tid)
 
-	delete(r.tasks, id)
+	delete(r.tasks, tid)
 
 	return nil
 }
 
-func (r *restream) StartProcess(id string) error {
+func (r *restream) StartProcess(id, user, group string) error {
+	if !r.enforce(user, group, id, "COMMAND") {
+		return ErrForbidden
+	}
+
+	tid := newTaskid(id, group)
+
 	r.lock.Lock()
 	defer r.lock.Unlock()
 
-	err := r.startProcess(id)
+	err := r.startProcess(tid)
 	if err != nil {
 		return err
 	}
@@ -1024,8 +1130,8 @@ func (r *restream) StartProcess(id string) error {
 	return nil
 }
 
-func (r *restream) startProcess(id string) error {
-	task, ok := r.tasks[id]
+func (r *restream) startProcess(tid string) error {
+	task, ok := r.tasks[tid]
 	if !ok {
 		return ErrUnknownProcess
 	}
@@ -1053,11 +1159,17 @@ func (r *restream) startProcess(id string) error {
 	return nil
 }
 
-func (r *restream) StopProcess(id string) error {
+func (r *restream) StopProcess(id, user, group string) error {
+	if !r.enforce(user, group, id, "COMMAND") {
+		return ErrForbidden
+	}
+
+	tid := newTaskid(id, group)
+
 	r.lock.Lock()
 	defer r.lock.Unlock()
 
-	err := r.stopProcess(id)
+	err := r.stopProcess(tid)
 	if err != nil {
 		return err
 	}
@@ -1067,8 +1179,8 @@ func (r *restream) StopProcess(id string) error {
 	return nil
 }
 
-func (r *restream) stopProcess(id string) error {
-	task, ok := r.tasks[id]
+func (r *restream) stopProcess(tid string) error {
+	task, ok := r.tasks[tid]
 	if !ok {
 		return ErrUnknownProcess
 	}
@@ -1092,15 +1204,21 @@ func (r *restream) stopProcess(id string) error {
 	return nil
 }
 
-func (r *restream) RestartProcess(id string) error {
+func (r *restream) RestartProcess(id, user, group string) error {
+	if !r.enforce(user, group, id, "COMMAND") {
+		return ErrForbidden
+	}
+
+	tid := newTaskid(id, group)
+
 	r.lock.RLock()
 	defer r.lock.RUnlock()
 
-	return r.restartProcess(id)
+	return r.restartProcess(tid)
 }
 
-func (r *restream) restartProcess(id string) error {
-	task, ok := r.tasks[id]
+func (r *restream) restartProcess(tid string) error {
+	task, ok := r.tasks[tid]
 	if !ok {
 		return ErrUnknownProcess
 	}
@@ -1118,11 +1236,17 @@ func (r *restream) restartProcess(id string) error {
 	return nil
 }
 
-func (r *restream) ReloadProcess(id string) error {
+func (r *restream) ReloadProcess(id, user, group string) error {
+	if !r.enforce(user, group, id, "COMMAND") {
+		return ErrForbidden
+	}
+
+	tid := newTaskid(id, group)
+
 	r.lock.Lock()
 	defer r.lock.Unlock()
 
-	err := r.reloadProcess(id)
+	err := r.reloadProcess(tid)
 	if err != nil {
 		return err
 	}
@@ -1132,8 +1256,8 @@ func (r *restream) ReloadProcess(id string) error {
 	return nil
 }
 
-func (r *restream) reloadProcess(id string) error {
-	t, ok := r.tasks[id]
+func (r *restream) reloadProcess(tid string) error {
+	t, ok := r.tasks[tid]
 	if !ok {
 		return ErrUnknownProcess
 	}
@@ -1164,7 +1288,7 @@ func (r *restream) reloadProcess(id string) error {
 	order := "stop"
 	if t.process.Order == "start" {
 		order = "start"
-		r.stopProcess(id)
+		r.stopProcess(tid)
 	}
 
 	t.parser = r.ffmpeg.NewProcessParser(t.logger, t.id, t.reference)
@@ -1185,19 +1309,25 @@ func (r *restream) reloadProcess(id string) error {
 	t.valid = true
 
 	if order == "start" {
-		r.startProcess(id)
+		r.startProcess(tid)
 	}
 
 	return nil
 }
 
-func (r *restream) GetProcessState(id string) (*app.State, error) {
+func (r *restream) GetProcessState(id, user, group string) (*app.State, error) {
 	state := &app.State{}
 
+	if !r.enforce(user, group, id, "GET") {
+		return state, ErrForbidden
+	}
+
+	tid := newTaskid(id, group)
+
 	r.lock.RLock()
 	defer r.lock.RUnlock()
 
-	task, ok := r.tasks[id]
+	task, ok := r.tasks[tid]
 	if !ok {
 		return state, ErrUnknownProcess
 	}
@@ -1254,21 +1384,27 @@ func (r *restream) GetProcessState(id string) (*app.State, error) {
 	return state, nil
 }
 
-func (r *restream) GetProcessLog(id string) (*app.Log, error) {
+func (r *restream) GetProcessLog(id, user, group string) (*app.Log, error) {
+	log := &app.Log{}
+
+	if !r.enforce(user, group, id, "GET") {
+		return log, ErrForbidden
+	}
+
+	tid := newTaskid(id, group)
+
 	r.lock.RLock()
 	defer r.lock.RUnlock()
 
-	task, ok := r.tasks[id]
+	task, ok := r.tasks[tid]
 	if !ok {
-		return &app.Log{}, ErrUnknownProcess
+		return log, ErrUnknownProcess
 	}
 
 	if !task.valid {
-		return &app.Log{}, nil
+		return log, nil
 	}
 
-	log := &app.Log{}
-
 	current := task.parser.Report()
 
 	log.CreatedAt = current.CreatedAt
@@ -1303,16 +1439,23 @@ func (r *restream) GetProcessLog(id string) (*app.Log, error) {
 	return log, nil
 }
 
-func (r *restream) Probe(id string) app.Probe {
-	return r.ProbeWithTimeout(id, 20*time.Second)
+func (r *restream) Probe(id, user, group string) app.Probe {
+	return r.ProbeWithTimeout(id, user, group, 20*time.Second)
 }
 
-func (r *restream) ProbeWithTimeout(id string, timeout time.Duration) app.Probe {
-	r.lock.RLock()
-
+func (r *restream) ProbeWithTimeout(id, user, group string, timeout time.Duration) app.Probe {
 	appprobe := app.Probe{}
 
-	task, ok := r.tasks[id]
+	if !r.enforce(user, group, id, "PROBE") {
+		appprobe.Log = append(appprobe.Log, ErrForbidden.Error())
+		return appprobe
+	}
+
+	tid := newTaskid(id, group)
+
+	r.lock.RLock()
+
+	task, ok := r.tasks[tid]
 	if !ok {
 		appprobe.Log = append(appprobe.Log, fmt.Sprintf("Unknown process ID (%s)", id))
 		r.lock.RUnlock()
@@ -1376,11 +1519,17 @@ func (r *restream) ReloadSkills() error {
 	return r.ffmpeg.ReloadSkills()
 }
 
-func (r *restream) GetPlayout(id, inputid string) (string, error) {
+func (r *restream) GetPlayout(id, user, group, inputid string) (string, error) {
+	if !r.enforce(user, group, id, "PLAYOUT") {
+		return "", ErrForbidden
+	}
+
+	tid := newTaskid(id, group)
+
 	r.lock.RLock()
 	defer r.lock.RUnlock()
 
-	task, ok := r.tasks[id]
+	task, ok := r.tasks[tid]
 	if !ok {
 		return "", ErrUnknownProcess
 	}
@@ -1399,15 +1548,21 @@ func (r *restream) GetPlayout(id, inputid string) (string, error) {
 
 var ErrMetadataKeyNotFound = errors.New("unknown key")
 
-func (r *restream) SetProcessMetadata(id, key string, data interface{}) error {
-	r.lock.Lock()
-	defer r.lock.Unlock()
+func (r *restream) SetProcessMetadata(id, user, group, key string, data interface{}) error {
+	if !r.enforce(user, group, id, "METADATA") {
+		return ErrForbidden
+	}
 
 	if len(key) == 0 {
 		return fmt.Errorf("a key for storing the data has to be provided")
 	}
 
-	task, ok := r.tasks[id]
+	tid := newTaskid(id, group)
+
+	r.lock.Lock()
+	defer r.lock.Unlock()
+
+	task, ok := r.tasks[tid]
 	if !ok {
 		return ErrUnknownProcess
 	}
@@ -1431,11 +1586,17 @@ func (r *restream) SetProcessMetadata(id, key string, data interface{}) error {
 	return nil
 }
 
-func (r *restream) GetProcessMetadata(id, key string) (interface{}, error) {
+func (r *restream) GetProcessMetadata(id, user, group, key string) (interface{}, error) {
+	if !r.enforce(user, group, id, "METADATA") {
+		return nil, ErrForbidden
+	}
+
+	tid := newTaskid(id, group)
+
 	r.lock.RLock()
 	defer r.lock.RUnlock()
 
-	task, ok := r.tasks[id]
+	task, ok := r.tasks[tid]
 	if !ok {
 		return nil, ErrUnknownProcess
 	}
@@ -1501,6 +1662,7 @@ func resolvePlaceholders(config *app.Config, r replace.Replacer) {
 	vars := map[string]string{
 		"processid": config.ID,
 		"reference": config.Reference,
+		"group":     config.Group,
 	}
 
 	for i, option := range config.Options {
diff --git a/restream/restream_test.go b/restream/restream_test.go
index 11b08240..ca256fe6 100644
--- a/restream/restream_test.go
+++ b/restream/restream_test.go
@@ -6,7 +6,9 @@ import (
 	"time"
 
 	"github.com/datarhei/core/v16/ffmpeg"
+	"github.com/datarhei/core/v16/iam"
 	"github.com/datarhei/core/v16/internal/testhelper"
+	"github.com/datarhei/core/v16/io/fs"
 	"github.com/datarhei/core/v16/net"
 	"github.com/datarhei/core/v16/restream/app"
 	"github.com/datarhei/core/v16/restream/replace"
@@ -30,9 +32,27 @@ func getDummyRestreamer(portrange net.Portranger, validatorIn, validatorOut ffmp
 		return nil, err
 	}
 
+	dummyfs, err := fs.NewMemFilesystem(fs.MemConfig{})
+	if err != nil {
+		return nil, err
+	}
+
+	iam, err := iam.NewIAM(iam.Config{
+		FS: dummyfs,
+		Superuser: iam.User{
+			Name: "foobar",
+		},
+		JWTRealm:  "",
+		JWTSecret: "",
+		Logger:    nil,
+	})
+
+	iam.AddPolicy("$anon", "$none", "process:*", "CREATE|GET|DELETE|UPDATE|COMMAND|PROBE|METADATA|PLAYOUT")
+
 	rs, err := New(Config{
 		FFmpeg:  ffmpeg,
 		Replace: replacer,
+		IAM:     iam,
 	})
 	if err != nil {
 		return nil, err
@@ -85,16 +105,16 @@ func TestAddProcess(t *testing.T) {
 	process := getDummyProcess()
 	require.NotNil(t, process)
 
-	_, err = rs.GetProcess(process.ID)
-	require.NotEqual(t, nil, err, "Unset process found (%s)", process.ID)
+	_, err = rs.GetProcess(process.ID, "", "")
+	require.Equal(t, ErrUnknownProcess, err)
 
 	err = rs.AddProcess(process)
 	require.Equal(t, nil, err, "Failed to add process (%s)", err)
 
-	_, err = rs.GetProcess(process.ID)
+	_, err = rs.GetProcess(process.ID, "", "")
 	require.Equal(t, nil, err, "Set process not found (%s)", process.ID)
 
-	state, _ := rs.GetProcessState(process.ID)
+	state, _ := rs.GetProcessState(process.ID, "", "")
 	require.Equal(t, "stop", state.Order, "Process should be stopped")
 }
 
@@ -107,10 +127,10 @@ func TestAutostartProcess(t *testing.T) {
 
 	rs.AddProcess(process)
 
-	state, _ := rs.GetProcessState(process.ID)
+	state, _ := rs.GetProcessState(process.ID, "", "")
 	require.Equal(t, "start", state.Order, "Process should be started")
 
-	rs.StopProcess(process.ID)
+	rs.StopProcess(process.ID, "", "")
 }
 
 func TestAddInvalidProcess(t *testing.T) {
@@ -190,10 +210,10 @@ func TestRemoveProcess(t *testing.T) {
 	err = rs.AddProcess(process)
 	require.Equal(t, nil, err, "Failed to add process (%s)", err)
 
-	err = rs.DeleteProcess(process.ID)
+	err = rs.DeleteProcess(process.ID, "", "")
 	require.Equal(t, nil, err, "Set process not found (%s)", process.ID)
 
-	_, err = rs.GetProcess(process.ID)
+	_, err = rs.GetProcess(process.ID, "", "")
 	require.NotEqual(t, nil, err, "Unset process found (%s)", process.ID)
 }
 
@@ -219,17 +239,17 @@ func TestUpdateProcess(t *testing.T) {
 	require.NotNil(t, process3)
 	process3.ID = "process2"
 
-	err = rs.UpdateProcess("process1", process3)
+	err = rs.UpdateProcess("process1", "", "", process3)
 	require.Error(t, err)
 
 	process3.ID = "process3"
-	err = rs.UpdateProcess("process1", process3)
+	err = rs.UpdateProcess("process1", "", "", process3)
 	require.NoError(t, err)
 
-	_, err = rs.GetProcess(process1.ID)
+	_, err = rs.GetProcess(process1.ID, "", "")
 	require.Error(t, err)
 
-	_, err = rs.GetProcess(process3.ID)
+	_, err = rs.GetProcess(process3.ID, "", "")
 	require.NoError(t, err)
 }
 
@@ -255,34 +275,34 @@ func TestGetProcess(t *testing.T) {
 	rs.AddProcess(process3)
 	rs.AddProcess(process4)
 
-	_, err = rs.GetProcess(process1.ID)
+	_, err = rs.GetProcess(process1.ID, "", "")
 	require.Equal(t, nil, err)
 
-	list := rs.GetProcessIDs("", "")
+	list := rs.GetProcessIDs("", "", "", "")
 	require.Len(t, list, 4)
 	require.ElementsMatch(t, []string{"foo_aaa_1", "bar_bbb_2", "foo_ccc_3", "bar_ddd_4"}, list)
 
-	list = rs.GetProcessIDs("foo_*", "")
+	list = rs.GetProcessIDs("foo_*", "", "", "")
 	require.Len(t, list, 2)
 	require.ElementsMatch(t, []string{"foo_aaa_1", "foo_ccc_3"}, list)
 
-	list = rs.GetProcessIDs("bar_*", "")
+	list = rs.GetProcessIDs("bar_*", "", "", "")
 	require.Len(t, list, 2)
 	require.ElementsMatch(t, []string{"bar_bbb_2", "bar_ddd_4"}, list)
 
-	list = rs.GetProcessIDs("*_bbb_*", "")
+	list = rs.GetProcessIDs("*_bbb_*", "", "", "")
 	require.Len(t, list, 1)
 	require.ElementsMatch(t, []string{"bar_bbb_2"}, list)
 
-	list = rs.GetProcessIDs("", "foo_*")
+	list = rs.GetProcessIDs("", "foo_*", "", "")
 	require.Len(t, list, 2)
 	require.ElementsMatch(t, []string{"foo_aaa_1", "foo_ccc_3"}, list)
 
-	list = rs.GetProcessIDs("", "bar_*")
+	list = rs.GetProcessIDs("", "bar_*", "", "")
 	require.Len(t, list, 2)
 	require.ElementsMatch(t, []string{"bar_bbb_2", "bar_ddd_4"}, list)
 
-	list = rs.GetProcessIDs("", "*_bbb_*")
+	list = rs.GetProcessIDs("", "*_bbb_*", "", "")
 	require.Len(t, list, 1)
 	require.ElementsMatch(t, []string{"bar_bbb_2"}, list)
 }
@@ -295,22 +315,22 @@ func TestStartProcess(t *testing.T) {
 
 	rs.AddProcess(process)
 
-	err = rs.StartProcess("foobar")
+	err = rs.StartProcess("foobar", "", "")
 	require.NotEqual(t, nil, err, "shouldn't be able to start non-existing process")
 
-	err = rs.StartProcess(process.ID)
+	err = rs.StartProcess(process.ID, "", "")
 	require.Equal(t, nil, err, "should be able to start existing process")
 
-	state, _ := rs.GetProcessState(process.ID)
+	state, _ := rs.GetProcessState(process.ID, "", "")
 	require.Equal(t, "start", state.Order, "Process should be started")
 
-	err = rs.StartProcess(process.ID)
+	err = rs.StartProcess(process.ID, "", "")
 	require.Equal(t, nil, err, "should be able to start already running process")
 
-	state, _ = rs.GetProcessState(process.ID)
+	state, _ = rs.GetProcessState(process.ID, "", "")
 	require.Equal(t, "start", state.Order, "Process should be started")
 
-	rs.StopProcess(process.ID)
+	rs.StopProcess(process.ID, "", "")
 }
 
 func TestStopProcess(t *testing.T) {
@@ -320,21 +340,21 @@ func TestStopProcess(t *testing.T) {
 	process := getDummyProcess()
 
 	rs.AddProcess(process)
-	rs.StartProcess(process.ID)
+	rs.StartProcess(process.ID, "", "")
 
-	err = rs.StopProcess("foobar")
+	err = rs.StopProcess("foobar", "", "")
 	require.NotEqual(t, nil, err, "shouldn't be able to stop non-existing process")
 
-	err = rs.StopProcess(process.ID)
+	err = rs.StopProcess(process.ID, "", "")
 	require.Equal(t, nil, err, "should be able to stop existing running process")
 
-	state, _ := rs.GetProcessState(process.ID)
+	state, _ := rs.GetProcessState(process.ID, "", "")
 	require.Equal(t, "stop", state.Order, "Process should be stopped")
 
-	err = rs.StopProcess(process.ID)
+	err = rs.StopProcess(process.ID, "", "")
 	require.Equal(t, nil, err, "should be able to stop already stopped process")
 
-	state, _ = rs.GetProcessState(process.ID)
+	state, _ = rs.GetProcessState(process.ID, "", "")
 	require.Equal(t, "stop", state.Order, "Process should be stopped")
 }
 
@@ -346,21 +366,21 @@ func TestRestartProcess(t *testing.T) {
 
 	rs.AddProcess(process)
 
-	err = rs.RestartProcess("foobar")
+	err = rs.RestartProcess("foobar", "", "")
 	require.NotEqual(t, nil, err, "shouldn't be able to restart non-existing process")
 
-	err = rs.RestartProcess(process.ID)
+	err = rs.RestartProcess(process.ID, "", "")
 	require.Equal(t, nil, err, "should be able to restart existing stopped process")
 
-	state, _ := rs.GetProcessState(process.ID)
+	state, _ := rs.GetProcessState(process.ID, "", "")
 	require.Equal(t, "stop", state.Order, "Process should be stopped")
 
-	rs.StartProcess(process.ID)
+	rs.StartProcess(process.ID, "", "")
 
-	state, _ = rs.GetProcessState(process.ID)
+	state, _ = rs.GetProcessState(process.ID, "", "")
 	require.Equal(t, "start", state.Order, "Process should be started")
 
-	rs.StopProcess(process.ID)
+	rs.StopProcess(process.ID, "", "")
 }
 
 func TestReloadProcess(t *testing.T) {
@@ -371,27 +391,27 @@ func TestReloadProcess(t *testing.T) {
 
 	rs.AddProcess(process)
 
-	err = rs.ReloadProcess("foobar")
+	err = rs.ReloadProcess("foobar", "", "")
 	require.NotEqual(t, nil, err, "shouldn't be able to reload non-existing process")
 
-	err = rs.ReloadProcess(process.ID)
+	err = rs.ReloadProcess(process.ID, "", "")
 	require.Equal(t, nil, err, "should be able to reload existing stopped process")
 
-	state, _ := rs.GetProcessState(process.ID)
+	state, _ := rs.GetProcessState(process.ID, "", "")
 	require.Equal(t, "stop", state.Order, "Process should be stopped")
 
-	rs.StartProcess(process.ID)
+	rs.StartProcess(process.ID, "", "")
 
-	state, _ = rs.GetProcessState(process.ID)
+	state, _ = rs.GetProcessState(process.ID, "", "")
 	require.Equal(t, "start", state.Order, "Process should be started")
 
-	err = rs.ReloadProcess(process.ID)
+	err = rs.ReloadProcess(process.ID, "", "")
 	require.Equal(t, nil, err, "should be able to reload existing process")
 
-	state, _ = rs.GetProcessState(process.ID)
+	state, _ = rs.GetProcessState(process.ID, "", "")
 	require.Equal(t, "start", state.Order, "Process should be started")
 
-	rs.StopProcess(process.ID)
+	rs.StopProcess(process.ID, "", "")
 }
 
 func TestProbeProcess(t *testing.T) {
@@ -402,7 +422,7 @@ func TestProbeProcess(t *testing.T) {
 
 	rs.AddProcess(process)
 
-	probe := rs.ProbeWithTimeout(process.ID, 5*time.Second)
+	probe := rs.ProbeWithTimeout(process.ID, "", "", 5*time.Second)
 
 	require.Equal(t, 3, len(probe.Streams))
 }
@@ -415,12 +435,15 @@ func TestProcessMetadata(t *testing.T) {
 
 	rs.AddProcess(process)
 
-	data, _ := rs.GetProcessMetadata(process.ID, "foobar")
+	data, err := rs.GetProcessMetadata(process.ID, "", "", "foobar")
+	require.Error(t, ErrMetadataKeyNotFound)
 	require.Equal(t, nil, data, "nothing should be stored under the key")
 
-	rs.SetProcessMetadata(process.ID, "foobar", process)
+	err = rs.SetProcessMetadata(process.ID, "", "", "foobar", process)
+	require.NoError(t, err)
 
-	data, _ = rs.GetProcessMetadata(process.ID, "foobar")
+	data, err = rs.GetProcessMetadata(process.ID, "", "", "foobar")
+	require.NoError(t, err)
 	require.NotEqual(t, nil, data, "there should be something stored under the key")
 
 	p := data.(*app.Config)
@@ -436,26 +459,26 @@ func TestLog(t *testing.T) {
 
 	rs.AddProcess(process)
 
-	_, err = rs.GetProcessLog("foobar")
+	_, err = rs.GetProcessLog("foobar", "", "")
 	require.NotEqual(t, nil, err, "shouldn't be able to get log from non-existing process")
 
-	log, err := rs.GetProcessLog(process.ID)
+	log, err := rs.GetProcessLog(process.ID, "", "")
 	require.Equal(t, nil, err, "should be able to get log from existing process")
 	require.Equal(t, 0, len(log.Prelude))
 	require.Equal(t, 0, len(log.Log))
 
-	rs.StartProcess(process.ID)
+	rs.StartProcess(process.ID, "", "")
 
 	time.Sleep(3 * time.Second)
 
-	log, _ = rs.GetProcessLog(process.ID)
+	log, _ = rs.GetProcessLog(process.ID, "", "")
 
 	require.NotEqual(t, 0, len(log.Prelude))
 	require.NotEqual(t, 0, len(log.Log))
 
-	rs.StopProcess(process.ID)
+	rs.StopProcess(process.ID, "", "")
 
-	log, _ = rs.GetProcessLog(process.ID)
+	log, _ = rs.GetProcessLog(process.ID, "", "")
 
 	require.NotEqual(t, 0, len(log.Prelude))
 	require.NotEqual(t, 0, len(log.Log))
@@ -471,13 +494,13 @@ func TestPlayoutNoRange(t *testing.T) {
 
 	rs.AddProcess(process)
 
-	_, err = rs.GetPlayout("foobar", process.Input[0].ID)
-	require.NotEqual(t, nil, err, "playout of non-existing process should error")
+	_, err = rs.GetPlayout("foobar", "", "", process.Input[0].ID)
+	require.Equal(t, ErrUnknownProcess, err)
 
-	_, err = rs.GetPlayout(process.ID, "foobar")
+	_, err = rs.GetPlayout(process.ID, "", "", "foobar")
 	require.NotEqual(t, nil, err, "playout of non-existing input should error")
 
-	addr, _ := rs.GetPlayout(process.ID, process.Input[0].ID)
+	addr, _ := rs.GetPlayout(process.ID, "", "", process.Input[0].ID)
 	require.Equal(t, 0, len(addr), "the playout address should be empty if no port range is given")
 }
 
@@ -494,13 +517,13 @@ func TestPlayoutRange(t *testing.T) {
 
 	rs.AddProcess(process)
 
-	_, err = rs.GetPlayout("foobar", process.Input[0].ID)
-	require.NotEqual(t, nil, err, "playout of non-existing process should error")
+	_, err = rs.GetPlayout("foobar", "", "", process.Input[0].ID)
+	require.Equal(t, ErrUnknownProcess, err)
 
-	_, err = rs.GetPlayout(process.ID, "foobar")
+	_, err = rs.GetPlayout(process.ID, "", "", "foobar")
 	require.NotEqual(t, nil, err, "playout of non-existing input should error")
 
-	addr, _ := rs.GetPlayout(process.ID, process.Input[0].ID)
+	addr, _ := rs.GetPlayout(process.ID, "", "", process.Input[0].ID)
 	require.NotEqual(t, 0, len(addr), "the playout address should not be empty if a port range is given")
 	require.Equal(t, "127.0.0.1:3000", addr, "the playout address should be 127.0.0.1:3000")
 }
@@ -512,10 +535,9 @@ func TestAddressReference(t *testing.T) {
 	process1 := getDummyProcess()
 	process2 := getDummyProcess()
 
-	process2.ID = "process2"
-
 	rs.AddProcess(process1)
 
+	process2.ID = "process2"
 	process2.Input[0].Address = "#process:foobar=out"
 
 	err = rs.AddProcess(process2)