We have been asking WGT for a long time to offer TIER specific options for Country Club Tourneys.
Best you can do is create Tourneys with an OBVIOUS NAME.
Eg;
MASTERS ONLY MAYHEM
LEGENDS ONLY CHALLENGE
PROS & BELOW ONLY - for a sleeve!!
Avoid creating Premium tourneys (for credits) some peanut will enter out of tier and win and then you have to message them to buy the correct winner equivalent n Balls etc
Monitor those tourneys and message anyone out of the correct tier that they are disqualified.