Hi Kristiyan,
Not all folks who work in tech are guys. Maybe you could consider a more gender neutral greeting next time.
The plugin works on WP’s global roles. I am not familiar enough with Affiliate WP to know what they are doing, but a lot of memberships use their own custom systems to manage who can see what.
It is possible to code support for “pseudo” roles into the Nav Menu Roles plugin… Meaning NMR will treat a Membership level as a “role”. There’s an example in the FAQ:
https://www.ads-software.com/plugins/nav-menu-roles/#adding%20a%20new%20%E2%80%9Crole%E2%80%9D
Effectively you need to add it to the list displayed in the menu item and then also provide code for determining if the current user has access or not.
And some fully-coded example plugins here:
https://github.com/helgatheviking/nav-menu-roles-wishlists-memberships
https://github.com/helgatheviking/nav-menu-roles-woocommerce-memberships
cheers,
-kathy