Ok, but can i have a list like of all my servers who's in my adress book of my custom RU ?
Do you mean if you can separate in your address book which hosts connect through which server (public or self-hosted)?
Not in Android/iOS version yet, sorry. We are working on adding a full fledged address book to the mobile client though.
As for the desktop Viewer you should just switch to the Details view
an look/sort using the Connection type