My situation has changed from previous posts. I have been trying to give selective access to Custom Posts. I have been doing that successfully (although a bit complicated) through combination of URL groups. "Categories" were not available.
Now, the plugin that generates the custom post types has been altered and it is possible to assign a standard category to each custom post.
In principle, this means that all I have to do control access is to create a Membership Level where Category is placed in the "Positive Rules". My understanding is that access through that membership level will entitle the member to access only Posts whose Category is specified in the positive rules.
HOWEVER... that does not work. Instead, anyone who has access to the protected url AND who is logged in as something higher than a FREE user can have access to everything.
Does this mean that Categories do NOT protect Custom Posts (only regular posts)? Or am I doing something wrong?
Control through categories would simplify my life a lot.
Thanks for any advice.