Using Linux you can connect multiple keyboards, monitors etc. and use one CPU with multiple users, each logged in to their own home environment.
See what I mean here: Linuxgazette
Is there any way to achieve the same on OS X?
Clarification: All viewers seem to understand this question as: remote logon, or remote X. This is NOT the question.
I hope the following diagram will clarify:
|-------| |single | |MAC OS | |box | |-------| |_Monitor1__keyb1__Mouse1__user1 | | |_Monitor2__keyb2__Mouse2__user2
Remark: It seems X11 is available on OS X. I haven't seen any practical examples yet. Remote X seems possible using X11. Not sure at all about multiseat capability with additional mouse and keyb..
Perhaps this may be 'a' way to go?