Mecanim animation clip mask

I’m using Mecanim in Unity 4.1.2f1. I am wondering how to use body and transform masks for animation clip (not for animation layer). Can I set per-bone mask? Or it wold be overrided by bodymask all the same? I mean, for example, the situation when body mask for animation clip wold be only legs, but to choose only lower part of legs in transform mask?
Thanks in advance.

In the screenshot in your related question (Using mask in Mecanim - Questions & Answers - Unity Discussions), there’s a picture of a body mask with a solid circle under the feet. This is the root. If you enable all the other body parts and disable the circle, it should disable root motion. I prefer body masks to transform masks because it more clearly shows how a retargeted animation will affect an avatar.