I'm considering using WordPress Multisite for an upcoming project. However, there's one important thing that I still need clarification on.
If I have a multisite network of, say, .. only 2 different sites (Site A & Site B) ... If a user registers for a user account on Site B and then logs in to Site B, ... if they know what the URL is for Site A .. can they then visit Site A and interact with it as though they are a registered and logged in user of Site A?
If the answer to this is yes, .. then what if both Site A and Site B feature premium content that should only be accessible for users that are registered for that site?
In other words .. if I want the registered users for Site A to only be able to access the premium content that's on Site A .. and for the registered user for Site B to only be able to access the premium content that's on Site B, .. is there any way to accomplish that using WordPress multisite? (using additional plugins, etc). If so, how?
Or does WordPress multisite simply just NOT work that way, .. and would it be foolish for me to consider using it for my project, given the context that I've provided?
Software/Hardware used: WordPress, WordPress Multisite, PHP, MySQL