In my opinion role won't be exclusive. I would accept them all.

But, organizations have different levels of "visibility" for documents.

In fedi, for example can be: 1to1 chats, closed groups, global groups, and why not, federated posts. "Only to followers" visibility can be seen as a group but difficult to manage.

Pleroma and derivated, plus Misskey have ability to post not federated, also (I can't say for other softwares).