How to set-up Airport Timed Access Control such that Airplay keeps working?

I just tried using Airport Utility's Timed Access Control for my Airport Express and MacBook Pro. Unfortunately the Airport Express cuts out all communication with a device during the restricted time, including the Airplay "channel".

Is it possible to configure the Timed Access Control such that only WAN access is blocked and the Airport Express is kept working in "LAN-mode"?