I still do not see the need for bridging if you're using DHCP. Separate the networks, get rid of the bridging, and start a DHCP server instance on each network. There is no easy way to "tunnel" through a bridge that is separated with split horizon. If you want to control how clients talk to each other then the safest/easiest way is using an IP firewall. You can disable the split horizon and enable use-ip-firewall under /interface bridge settings. Then segregate clients with /ip firewall filter.No we do not. Each client connects to an AP with a wireless unit at their location, there is no need to install a separate mikrotik unit at each house as that adds more to overhead and more headaches. We hand out non-routable IP's via a centralized DHCP server and everything is bridged which makes for ease of maintenance as its easy to communicate with every part of the network.
I just told you how...So is there any way to tunnel around a bridge that is isolated with split-horizon?