We have DNN 4.6.2 with module Forum 4.4.3

We created a single form module on a page,

We added three Forum Groups 1,2 and 3,

We added forums to each forum group in this pattern, 1-i, 1-ii, 1-iii, 2-I, 2-ii, 2-ii, etc…

Our use case:

Some Users have rights to all forums, these are User A types

Some Users have right to one or more forums, these are User B type

User A must view and edit Forum Group 1-i, 1-ii and 1-iii

User B must have rights to view and edit only forum 1-ii and excluded from all other forums.

How do we trim permission? <cause I’ve tried this>

Created the forum module on page A, with the earlier mentioned groups and forums as above,

Copied the forum to page B,

We’ve granted  User B rights to Page B using the Page permission Settings,

We’ve granted User B rights to View the Forum module by Inheriting permission from the page permission settings.

We’ve edited the forum module settings on page B,

            Changed the ‘Forum Group’ value to Forum Group 1,

            Changed the ‘Default Forum’ value to forum 1-ii,

In the Manage Forum settings we’ve changed the general setting:

We’re granted User B rights to the only the forum ‘1-ii’ using the Manage Forum setting by adding this User to the permission and selecting the view and add thread. 

The Only other permissions belongs to the User A for Edit, view etc... 

When User B has established a signin, Selects page B and they can view and edit every forum in Forum Group 1

So, how do we trim permission?

Hi Matthias,  Your absolutely right.  They have permissions to these forums.  This user has access to the forum module which has the group of Forums.  So, they can view, edit and reply to any forum within a group of forums.   When I remove the forums inhereting permission from the page.  Then, they cannot view edit or reply to the forum.  That was simply.  

So, when we want to allow this user to 'View', 'Edit' and 'Reply' to a specific forum. We must place this particular forum in a specific 'group of forums' and expose that group forum to the subject page.   The forums module will inheret the permission and User B will have permission to the just this specific forum group.   So, forum groups [or grouping] is a feature designed around users with alike permissions rather than forum topics or subjects...  So, we should really rename our forums grouping to "User A types forums" and "User B types forums"....Additionally, we must ignore the General Setting for permission because it does not provide any edits to the user's permissions. The group of forums is just what it is a Group of alike users.  No trimming of permissions needed, don't need to add or delete either a role or users permission.    

Cool

Or I'm I reading this wrong?