Hey,
You could lock down the layout - so that they can only get to it from a button (essentially taking it off the list of layouts in the list in the status area). Then, in the button, put this in (or something like it):
IF [Get(PrivilegeSetName) = "YouDontHaveAccess"]
Go to Layout("OtherLayout"
End If
That should do it!
HTH,
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