There are certain things that lets you do this but not on every cases.
For example, when accessing forums and panels, you can set which ranks can only access this.
Please go to Admin Panel > Menu > Panel Layouts, edit a panel settings in there, choose anything, you can see that there are ranks listed on it, you need to choose which ranks can only access it.
With Forums, do the same, choose specifically which forum you want to edit.
Let us know how you get on with it.
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