I believe that some network devices poll that information from their hosts. Not all servers may be requesting the same info, Unix based or otherwise. I have noticed this on router DHCP tables, for instance some do, and some don't.
In the case of OS 9.2, you open the File Sharing control panel, and there you will find fields for "owner name" and "computer name". Try changing those and see if that helps.
....JIM....