I'll try to translate if I understood you well.
"I have a big problem,
I want to make a special mission where one man ( dressed as a civilian for example ) can check out on the actions of all other players. Can you tell me how to do this, for I'm a complete newbie in this subject.
Thanks in advance"
I hope I covered what you wanted to say and I think you picked the wrong forum. You should go to editing multiplayer forum.
Tomasz