lock

Hello,

Is there something like lock or xlockmore on QNX-RTP, that I can use to
prevent unathorized access to my computer during my absence in office
room? (program should on click or key combination lock the seesion and
ask for password to unlock it) If not, is there a way to use screensaver
with password to do this stuff immediatelly?

Thanks

Ladislav Kostal