Is it possible for a client to get the IPs of other clients in the server? I doubt it but it's worth a shot.
Maybe a better question would be, "Is there a way to authenticate users given only their name and the IP of the server they're on?"
Authenticate for what?
Does authentication take BLID into account?
Just name and IP
On a semi-related note, is there a way to get the server's public IP? (other than using some external server)
What are you doing that you need to authenticate clients like this?
He's planning on adding BLID/name/possible IP collection to Support_Updater I believe