When users are added to a Live Room, a list of those users is visible to everyone in the Users Panel.
To see who is active in your Live Room, select the Users icon in the bottom right corner. When users are active in a Live Room a number will appear on this icon indicating the number of users in the room at that time.
1. Users who are invited to a live room, but inactive will have a gray dot next to their name.
2. Users who are active in the Live Room, will appear with a green active or red muted microphone next to their name.
3. Stream Admins appear bolded compared to other users.
Note, only Stream Admins will see the More icon next to user names.
Larger view for context: