Child Draggers that follow the position, rotation, and scale of the Parent dragger, from the set origin of the object. While allowing you to move the child dragger without moving the parent dragger.
This would be amazing!
David Simons (Adobe) commented
Not exactly what you're looking for (because you can't control it via Dragger), but you can get parent-child independent movement by keyframing properties of the Transform behavior after applying it at different levels in the puppet hierarchy.