(this is related to #101, but not exactly the same)

I have a complex wireguard setup where not all nodes can directly talk to each. This works fine at the moment (prior to migration no ansible-wireguard) because there is one central node that all peers can reach (and which has an allowed_ips configured that is wide enough to cover all nodes). I only configure peers that are actually reachable.

It would be great if there was a way of explicitly specifying the peers that should be exported for a particular node, and otherwise exporting all available peers.