Is it possible (on the Palm Treo/T3 etc.) to move a bunch of contacts
who all have the same somain name email address into a new category?

E.g. Put tom@em4ail.com, bob@em4ail.com, sue@em4ail.com and
jen@em4ail.com all in "Work" category in the Contacts app.
I need something that can search through my list of contacts to do this.
I don't want to do it one-by-one and I *really* don't want to sync with
Outlook :-( as I always get duplicates.
Ideas anyone...?
Thanks