XBee Wi-Fi S6B Point-Multipoint Configuration

I working on a project where I have a raspberry communicating with several arduinos. I was thinking on using XBee WiFi modules, because I know I have enough coverage.

Before buying the modules, I just want to knoe how the point-multipoint communication works. You just need to set the AP configuration in all the modules? Or you need to additionally tell each module which IP address they need to communicate to.
It would be great if all the modules could listen to all the messages in the Wireless Network, without specifying IP Addresses. Thanks.

You would need to use a 3rd party access point, then tell each XBee WIFI what IP address to send the data to.