With one of last revision Kadu got a new feature - tree view for contacts. Now you can expand (with right-arrow button) any contact to see all connection to it (like Gadu-Gadu and Jabber ones). In near future double-clicking on any item will open chat window using choosen protocol and account, and every item will have its own context menu... Now just a simple screenshot:
My number is shown (btw: if you want to talk to me, use Private Messages on our forum or comments on this blog).
If someone has a screenshot with contact that has more than one subcontact - please send it to me.
Edit: screenshot from White Eagle