On Mon, 28 Nov 2011, Les Mikesell wrote:
Logging out of the Gnome desktop should do it, but the whole concept seems very wrong. Even if all the users are working at the same console, they should have different logins.
+1
If you don't have separate logins, or delete and fully recreate the account inbetween logins, you're only pretending to have any degree of security.
jh