Hi, i'm running a pc with two ips one of them inside an vpn, and i only want the web-ui to listen inside the vpn, so I have patched my own ui/web/server.py to do this, and is extremelly simple: http://pub.phofe.es/deluge-web-patch/
I will be happy if you add this to trunk so i won't have to patch it again on every update xD