I am not sure if i understand you right, my english is not so good.

You want to scan (on_f = scan) from the camerapos?
You can do that and when you scan, all entities in the scan area set their EVENT_SCAN (set ENABLE_SCAN for all entities). Now the function that you saved in the entity - action (my.event = scan_function) runs. In this Function you can check if the event is giving from a scan (if (event_type == EVENT_SCAN)) and also check the skills of every entity(if (my.skill51 == 1)) .