Updating FEP-5219: Groups and permissions: https://codeberg.org/fediverse/fep/pulls/944/files I've introduced a new property, audiences, which lets you define collections containing actors with a specific role / privilege / affiliation: { "id": "https://social.example/group", "type": "Group", "audiences": { "admin": "https://social.example/group/admins", "moderator": "https://social.example/group/moderators", "member": "https://social.example/group/members" } } For example, you can use such collection to address an activity to group admins. These collections are also needed for interactionPolicy declarations, which has appeared in some proposals related to private groups. #fep_5219