Hello =^D

I wanted to ask you about a special use case we have. We've purchased Easy Discussions and we're trying to configure the system so that only one user group has access to post responses. This in and of itself is straight forward, however there is an additional requirement that members of the user group can only post responses in discussions which they have been invited to by either other members of the discussion or by the moderator.

Do you know if Easy Discussions can meet this requirement?
If not what would be your suggested approach to implementing this within Easy Discussions?
If you don't believe Easy Discussions is a good fit for this use case, do you have any recommend solution which might be able to accommodate this scenario?

Thank you in advance for your help.
Talk to you soon.