With the old client it didn't matter on how many computers Seti@Home ran, just the results mattered. I bet there are a lot of people who run/ran Seti on many computers. I don't think it's important to know all the IP-addresses and hostnames of the computers that are used in the project by an account. If i reinstall my PC once a month and change the hostname, the credit it has collected is then rendered irrelevant, because nothing will be added to it.

The duplicate enteries can be merged to clean up your pages. The host id is important in BOINC for verifing where the work was done.

John Keck
BOINCing since 2002/12/08

The ip on there site is only seen by you when you are logged in, the old SETI could see your ip because you connected to their server. If you dont want people to see your computers then you can hide them, this will only make your computers visible to you. :)
Good luck.