I need a external controller, "Layer Control" to work with layers inside of different compositions, because I don't want to appear as options all the layers in the "Layer Control". Only specific layers for each "layer Control" are two effects in a "null", and each has a function. This "null" is the panel what I created.
I think I understand what you're trying to do, but I'm not quite sure.
Lets say that Comp A has a bunch of layers in it, including Comp B. Above your timeline, you see the tab to open up the Comp B timeline. You can click that tab and drag it down to the bottom docking zone of the Comp A panel. Now you have two separate timeline windows open at once. From there, I believe you can parent specific layers or properties in Comp B to layers or properties in Comp A using the pick-whip. I hope that helps!
Thank you so much! Good idea, smart solution.
I did it, "Layer Control" is connected to an outer layer and inside comp that "Layer Control" is, now, have only layer that will be used to what I want. Work very well.