Is there a Ezurio Wifi module that supports 4ADDR mode and layer2 bridging?

Yes, Laird´s 60-radios support 4-addr mode and layer-2 bridging with Lairds specialized SUMMIT Wifi stack.

This functionality requires the use of software version (Gihub) or newer and Lairds Summit Software stack for the 60-series modules: /wireless-modules/wifi-modules-bluetooth/summit-software-stack-60-series

This is supported on all 60-radios including SU60-SIPT, SU60-2230-C, SOM60 and SOM8M+.

You can also reference this tutorial: