Does anyone know if it's possible to set the bind-ip to MAC feature only to specific SSID's on the 2920n?

For example; bind-ip to MAC for devices on SSID 1 but allow all / any MAC addresses to SSID 2.

Can't understand what you're trying to do.

Do you want ssid2 to give out different ip address's. If so the answer is no.

You can have 4 different SSID's on the 2920 so I want to use one of them as a guest SSID.

Unfortunately it doesn't seem possible to have a different DHCP scope for each SSID so every device is on the same subnet, but the firewall restricts access between different SSID's.

What I would like to do is only allow devices with specific MAC addresses to connect to SSID 1 and allow all devices (not restricted by MAC address) on SSID 2 (Guest SSID).

Is that possible?

Yes you can set security for each ssid.