Site Access Permissions on Multisite Network

Hello,

I would greatly appreciate it if someone could point me to some plugins that can help me set up my network of sites the way I want.

So let’s say I have a multisite network. The “main” website is Site1, and Site2, Site3, and Site4 are sites that are sub-directories of Site1.

Now let’s say I have a group of users called Half, and another group called Full.

I would like non-registered users to access Site1, but not Site2, Site3, or Site4. I would like users in the Half group to access Site1 and Site2, but not Site3 and Site4. And I would like users in the Full group to access Site1, Site2, Site3, and Site4.

I’ve looked around for plugins, but all the plugins I find either block just posts/pages and not whole sites, or don’t have any sort of user level or group control.

Is there any way I can accomplish this site stucture with WordPress plugins?

Thanks!