Kind of?

I’m not sure if this satisfies your use case, and I haven’t personally used this functionality.

Check out gluetun, I use this on my server to ensure that all traffic for certain Docker containers goes through a Wireguard VPN.

Honestly, federation with Hexbear has improved my Lemmy experience 1000%. I think it would be silly to defederate because a vocal minority of libs don’t like their worldview to be challenged. You can individually block the instance if you don’t appreciate the vibe.

As far as I can tell they embrace leftist unity which is something we could all use more of.