I've been trying to use the Morphing Tool in P7 to create morphs to help me out with some poke-through in clothing on some poses but I always have the same problem - I select the clothing item and its proper actor (in this case, the left collar on the Alicism shirt), I select the Custom Morph tab of the morphing tool and then I try to click on the correct area in the shirt and it always registers the click on the V4 model rather than the shirt since her polygons are poking through the shirt that I want to select.

First, lock Victoria. Then select the model. When you start to work on the pokethrough, work your way from an area that is NOT poking through inward toward the area that is poking through. You might be selecting Victoria because you are starting on some polygons that are poking through the clothing.