Hello Vepop,
I’m not sure what the result you are talking about is. Is it two hands with different Bone Hand, or there are four hands that want to use two sets of Bone Hand?
The embed Bone Hand we made is a set of two hands. If you want to use different gestures on the same character, using the Hand Pose Editor should meet your needs.
If this can not match your needs, please let me know the rest questions.
Daniel