Hi Andreas -
Thanks for reaching out. MAC Filtering and Rogue AP functions are not configurable in Ruckus Cloud version today. They are however fully configurable in underlying SZ. These will be surfaced in releases later this year (2H'2018).
Can you help us understand your use case on MAC Filtering? Are you simply looking to allow/block a mac address from joining, blacklisting a mac address? Related query is would you prefer IP address and application level filtering over MAC address filtering? We always love to know the use case.