I wouldn't have it be real-time for the security person. Let players setup these maps and if the guards or cameras see the infiltrator then he's caught and he loses, but the creator doesn't need to be playing at the same time. Just let people upload their configurations and other players can test their skills out against that security configuration for that map any time. The thing I like about this is that you can collect stats around a give players security setup and that way people can try out the hardest ones to see if they can get by. Maybe if you lose you have to wait 30 mins to try again or something. Then you can award the people with the best security setup or something like that.
For people who solve the setup, the creator can replay the mission in the eyes of the infiltrator to see what they did (or a god's view also). It would be fun to watch someone get passed your system I think.