Is it impossible to have a private community without running your own Lemmy server? Is it impossible to have n private communities without running n Lemmy servers? And to be part of multiple private communities you’d have to have an account on each server?
Is this true?


I believe that is correct as far as lemmy goes. The AP protocol is open by nature, but there may be a private implementation —I’m not sure.
There are several Discord-like projects, but I don’t think they are federated.