Yes - restricted access is what you want and it should work - https://docs.moodle.org/32/en/Restrict_access_settings#Group_and_groupings
Can you give a bit more detail about the problems you are having?
Yes - restricted access is what you want and it should work - https://docs.moodle.org/32/en/Restrict_access_settings#Group_and_groupings
Can you give a bit more detail about the problems you are having?