We have a large site, many user groups. Is it possible to adjust the MNTP so that users can only see/pick the nodes they have access to instead of the whole tree?

For example: we have a blog section, one blog post can appear on many pages, and we use the MNTP so that users can choose which pages these blogs appear under. But we don't want users to publish on pages they do not have permissions to. Right now, regardless of their permissions, the whole tree is visible via the MNTP.

I have the groups setup, and have assigned the nodes they have access to. Ideally, we would like to find a way to dynamically adjust the MNTP search/view so that only those nodes are visible to those users.

How can i accomplish this? Is it possible to do it via a c# class? if so, can you point me in the right direction? Or do i need to go try to extend the umbraco.controller.js ?

Thanks