Not sure if you can make modifications for any local church to have an exclusive sub-forum for pastor and elders to chat with the members of their congregation.
I think you would have to solicit the idea to a local church by e-mail to see if they find that appealing so they can ask questions from their pastors or elders that they otherwise would not have time for in Sunday school classes or during a sermon.
I think the exclusive part is to keep out those outside their local church that would otherwise share beliefs not consistent with the church. If the pastor & church knows that nobody will draw the little ones astray because of that exclusiveness, they may go for it.
Of course, that does not prevent any member or pastor to go elsewhere in the forum, but it is to be understood that a sub forum can be created for a local church to chat in or to even post a question that they are afraid to ask in church.
It is the duty of that church to inform all members of the congregation participating that they should be grounded in the word & church traditions before venturing out to other parts of this forum.
At any rate, this is a suggestion on how this site could provide a means for churches to grow more in the word that would not be otherwise available except Sunday and whatever plus days they have fellowship during the week, if at all.