nostr's distinctive difference is that you can do that

most social networks are consensus based and borderless, yet funny enough they need all this moderation

ownership can control most of this, and nostr stands ready to enable it 

 Yes, something like family only relay is possible. 

 it practically can be done right now with #realy and a client that doesn't presume to try and smoosh you into the rest of the network, as most of them do 

 Nostrudel and Amethyst are pretty damn customizable too, they're probably really good for home-only networks, yeah? 

 yeah, probably the two best