Playing root animation by it's node

Hi!

I've got some 3DS Max file with a lot of complex animations in a scene. When I import it to Unity I select "Store in Root" for the animation. But in this case Unity generates just 1 animation for all objects. My question is: Can I select specific objects that I want to animate with the root animation from code?

For example: I have this structure:

  Root (stores the animation clip)
  |-Node_1
  |-Node_2

And I want to apply the Root animation just to Node_1. How can I do that?

PS Choosing other rig generations don't solve the problem. "Store in node" mode is also not appropriate because I want to animate some groups of objects, not every single one by itself, it will take a lot of time and ruin the scene structure.

Thanks a lot!