Answer to first : IFF (IRL) means that an aircraft sends out a signal that identifies it to others having a way of reading that signal. If he sends the right code he will be seen as friend, if not then its an enemy (very simple explanation). Result in game, if the aircraft is part of a friendly or neutral then the AI wont attack it, if not then the AI will attack it and put it on the Link as enemy.
Answer to second : not yet. But hopefully this will be included in future patches.
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