The machine should, in my opinion, be the domain you are logged in on. I.e, if you are authenticated for domain www.foobar.com:1001, thats what it should say, according to an internal survey here at Torped (that means me and Johan). :-) It would be nice to have it configurable, but I'm not sure it's enough to configure it per instance. You may want to configure it per virtual domain too.