Two or more WDS via one wlan interface

Hi to all,

I have running hotspot network with 7 ap’s (1 main and 6 repeaters). I use WDS to link them all into one brigde.
Now, I would like to setup another “network” on the same hardware using VirtualAP interfaces.
I can create VirtualAP and 2nd bridge on all AP’s and 2nd WDS on VAP in main router, but how to create 2nd WDS on repeaters? Repeaters are in AP bridge mode and connected to main wlan.

Any help or advice?

Thanks to all.

Petar.