The Assignments tab shows individualized roles by Activity. Like the rest of the Eventene app, each Activity has its own expandable/collapsible section. Within each section are all of your assignments. Assignments are displayed as buckets (these mirror the buckets in the Assign phase of the web app). Each bucket shows the Place Name and all participants assigned to that Place. If you are a participant you can see your fellow participants.
Additionally, if you are a participant or contact in multiple Places within an Activity, you will see all of those buckets in the same section. This makes the Assignments tab an efficient summary of your roles at an Event.