RB411U - inverted access rule

Hi,
How can I exclude an user using MAC-filtering?
At the Wireless → Access list → New AP access rule
I can’t find the possibility of inverting.
The goal is avoid the disturbing IP-collosion.
Firewall rule?

Thank you in advance for your help.

Solution:

xxxx> /interface wireless access-list
xxxx /interface wireless access-list > print

mac-address=xx:xx:xx:xx:xx:xx interface=all signal-range=-120.120
authentication=no forwarding=no ap-tx-limit=0 client-tx-limit=0
private-algo=none private-key=“” private-pre-shared-key=“”
management-protection-key=“”


Period