user-switching behavior question

[Paul Kaplan]

One feature of a multi-user Windows system that I like is that when the 
screen-saver kicks in after a few minutes and a user goes to wake up the 
system, they are presented with a list of users on the machine and can then 
login to any account they choose.  I find this useful on a family machine where 
noone remembers to logout but everyone wants to keep their userspace hidden 
from other users.

Perhaps I'm not understanding quite how the user-switching applet in kubuntu 
works, but it looks like a user has to activiate it to get the system to lock 
the current user account and present with new login screen.

Is it possible to emulate the Windows configuration?

Paul