Basically Beehaw and all its communities and users are now blocking everyone from this server. We can't post to their communities and they can't see anything that we post on third party communities either.
However, this server has not defederated Beehaw. Therefore, we can still see their users commenting on third party communities, and we can even reply to them, they just won't see our reply, although neutral parties will.
Both Beehaw and sh.itjust.works are still able to contribute significant activity to Lemmy as a whole, just not directly to each other for now. Let's all be diligent on reporting and banning trolls quickly so we can maintain the collegial atmosphere here.