Possible AD/OD?

Hi new member here, please be gentle.

Currently the organisation I am working for has Active Directory and Open Directory not bound.

All users exist in Open Directory so they can access Mac shared directories. Windows users are duplicated in Active Directory so that they can access the Windows shared directories.

If bound, is it possible that the Windows users in Open Directory are removed and only exist in Active Directory, but have access to the Mac shared directories, and the Mac users stay in Open Directory as they don’t need access to Windows shared directories.

I hope that makes sense.
Thanks