Eggies generally don't know or care of nickserv, etc..
it cares of addresses of the form nick!user@host, which is matched against hostmasks in it's internal user database..
As you connect from your office, obviously the host-part (and possibly the user aswell) will be different, thus requiring a separate hostmask for your userlist entry.
Check out the IDENT msg command on how to identify yourself from new locations. You most likely also wish to have a look at the .+host and .-host partyline commands