Hi
I have not fully understand your needs.
If you need to apply a specific relative rotation, say, for a limb in a number of frames, then you can use commands from the "Edit" menu.
- Copy Pose of Selected Bone
- Copy Pose of Selected Bone with Children
- Copy Pose of Selected Bone's Children
- Paste Pose within ROI
Or do you need to retrack some limb in a number of frames after doing "Refit Pose", and want the tracker to avoid touching other parts of the skeleton? That is, effectively "locking" some body parts during tracking. This feature is planned for V3.