Two computers on one account

I have just added a second computer. Both are used in different ways, so I have set up separate preferences for each, called "home" and "work". However, when I change the default profile from home to work (or vice-versa), both machines show the same changed profile. How do I designate one computer to be the "home" machine and the other to be the "work" machine? They are physically both at home on the same internet connection.
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If you go to Your computers and click on the Details link of each computer, you'll find the Location dropdown listbox near the bottom of the page.

Gruß,
Gundolf
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Computer sind nicht alles im Leben. (Kleiner Scherz)

SETI@home classic workunits 3,758
SETI@home classic CPU time 66,520 hours