Hi Sander,
I might not understand your question complety but cant you use a xpath on the microflow retrieve of the FAQ section something simular to this:
[UserManagement.FAQ_UserRole/System.UserRole/System.UserRoles = '[%CurrentUser%]']
This retrieves the FAQ section which have a user role that the current user also has.
[MyFirstModule.Section_UserRole/System.UserRole/System.UserRoles = $currentUser]
To @Rom and @Maarten, thanks for your identical suggestions. I completely forgot the step from UserRole to UserRoles. After that, you can indeed relate it to $currentUser. Thanks big time!