In below topology
- Airplay server connected to wired port of the IAP.
- Client connected to the SSID with NAT vlan ( IAP assigned )
In the above scenario the client would not be able to connect to airplay as Airplay uses RTSP and it uses dynamic ports for mirroring screen to mirror screen to Apple TV, which would not happen over natted network. However, if the client connected to extended network, it could access airpaly server.