A community can own spaces the way a person does: a club's members post to each other under a dedicated community DID, with a feed space for content, a moderation space for notes, a labels space for filtering, and a single app view as the only window into any of it.
AT Protocol is public by default. Everything you write goes into a signed, archived, and rebroadcastable repository that anyone can read from and moves through relays. This core design decision makes the network so legible and easy to build on, but it also blocks entire types of apps, like private groups, gated content, member-only forums, or anything that isn’t meant for everyone.