Then again most nations aren’t federated, as such don’t have feds, so you should be able to figure that out…
If you want useful help, be explicit. Nobody is here to play guessing games because you can’t be arsed to state your jurisdiction and the world is full of federal police forces outside the US, including AFP and BPOL.
I’m fairly certain the legal ramifications are the same whether It’s GNU Social or Kbin. Sure platforms like Mastodon & Friendica give you more options for “defederating” “bad actors” than Pleroma or a NOSTR relay, but even that only does so much.
Hosting a CIFS server on a private network is on-topic for this community and has a wildly different liability profile that federated apps, which your post said nothing about.