Movieclip hitTests on particular layers of a movieclip?

Is this possible? I’m working on a game project for school and I’d like to cut down the amount of library items I’m going to have to make for each level (I have a clip for unwalkable areas, places where shots can impact and so on.) Is there a way I can just draw one movieclip per level and cut up its parts into different layers, then call hittests on just specific layers instead of the whole movieclip?

Many thanks,
Al