Correct. You csn use MAC addresses to identify the clients.
No. If you build a LAN bridge you have only a single LAN interface. You turn all ports that are memberd of the bridge into a switch. Switch is just a fancy word for bridge.So you can either use static assignments in your DHCP config and the IP addresses to identify clients or the clients' MAC addresses where possible. Firewall rules for example permit this.
I was thinking that. I'll try it tonight, thanks.