First half, restricted space. A sector or even an entire system that you can designate as being Restricted, which will fire on anyone other than your own faction that enters it. Similar to being hostile to neutral, only it affects everyone, but only in that one designated space.
And then set up a whitelist similar to the Manage Individual Enemies list that will allow individual players to enter your restricted space without being fired upon.
And then set up a whitelist similar to the Manage Individual Enemies list that will allow individual players to enter your restricted space without being fired upon.