Originally Posted by
Babysir
I think I understand what you mean. In short what you want is a situational macro. Let's say you have a mob and your tank is tanking away, but then mob switches targets and does some damage to your dps toon/s. What you want is a macro that will only cast a heal if the mob targets anyone but the tank. So if the mob switches from your tank to your dps then the heal would kick off, but it will never fire if the mob is still targetting the tank. In the end it should only work if the target is someone other than the tank, is that what you are asking?
If so, I don't think thats possible. I don't believe wow has that sort of thing built in to the macro system.