Site Set Up Question

I'm trying to use Membership to set up a site where the public can see everything on the site except protected pages/posts. I will have about 10 members who, when they login should be able to see a different menu, or front page content to direct them to only their organization's info. Do you have an FAQ page or a set of instructions for this. I can't seem to find a good resource, and I've spent way too much time looking. Thanks.