If you use levels, A thru P, then you will see if it's equal to. Have you set up security yet. Look thru some of the demo apps from Rockwell, should be plenty of examples.
You can also prevent them from opening a display. Each display has a setting for security, again A thru P. All you have to do is selecte the level, the rest is done for you.
Security in FTView is one of the worst. In my opinion it's very limited.