I want teacher only manage they own group.

I tested many plugin.
but I don't know what how can access limit teacher for management .

example

courseA
-teacher1
--tutor1
--tutor2
-teacher2
--tutor3
--tutor4

courseB
-teacher1
--tutor1
--tutor2
-teacher3
--tutor2
--tutor4

* teacher & tutor can have many group.
* teacher watching only they own group. (even same course.)
like this.

I saw other posting. but wpmu answer is not exist yet.
https://premium.wpmudev.org/forums/topic/coursepress-create-groupsclasses-assign-a-teacher-and-tutor

now coursepress had multi teacher function in a course .
but impossible "group manager" what group access limit with other plugin combination.

maybe I can make by mulisite & membership pro2 .
this way have many problem. it's not solution.
ex) copy course & user, progress integration, payment way, etc...

so I want group manager's function include in only single site.