Another scenario

LS,

I'm preparing a next drupal project and I consider the OG module as a very good candidate to be included in it :-) However I would like to know if CRUD can be based on memberships of multiple groups. I've 'some' experience with OG, but haven't had the opportunity to look into this matter. I'll elaborate what I want, with a small use-case. I've taken this use-case into the realm of education, but it's also applicable on several other realms (business for instance with organisation/proces groups).

There are 2 group types; a) Domain and b) Education
There is a contenttype: Course

The following groups exists:
- Domaintypes: French Language, English Language
- Educationtypes: First Grade and another one called: Second Grade

The following contenttypes Course exists:
- French First Grade
- French Second Grade

A student is a member of:
a) one or more groups of the type Domain
AND
b) one group of the type Education

What I would like to have is some CRUD based on the memberships of the groups. For instance in a way that the post 'French First Grade' can only be read by members of the groups: Domain Language AND Education First Grade

What I would like to know is:

1. Can this be done with OG?
2. If not, is there an existing sub module for this concept?
3. If it can be done with OG, can anyone point me in the direction of setting this up? (any OG (submodule) settings and/or og_access_hooks or so)
4. Should I define my own content_type_course module where I can specify the CRUD access rules and are there any caveats to this

Thx for reading (and answering of course) this.

Best,
VinceW