Re: Security for my WiFi network. (MAC filter, Access to Mobile Devices)
You can add MAC addresses by going to Network-wide ==> Clients ==> Add Client, you can also choose a group policy if you required to have custom firewall rules, shaping etc.
However MAC address based restrictions are not the best thing to do as this can be easily spoofed. I would highly recommend looking in to deploying 802.1X with EAP-TLS or using Meraki MDM to manage and restrict the devices which will be using the SSID's.