I'm working in a WPMU project and I need some help with an issue.
I need to allow just one kind of user to be able to create new users. I mean, in my project I'm using the Pro Sites plugin to manage purchasing plans for my users, and I have 5 different plans:
Free - With 1 theme and 5 plugins.
Standart - With more 2 themes and another plugins.
Professional - With more 3 themes and some other plugins.
Elite - With more 3 themes and all the plugins.
Business - With all the themes and some plugins.
But I need the Free, Standart, Professional, and Elite set up to just one user, they can not create users to use their blogs with them. To have multi users blog the user must purchase the Business plan, and they can create how much users they want.
Is there some way to limit the user creation to just one plan?