Can wpa_supplicant run several instance on the interface?

[long shawn]

I have two wifi interfaces bridged to br0, so the two interfaces will share
the same ip address.
Then I want to run wpa_supplicant on each interface, and run it as external
registrar.

The problems are,
1. Does wpa_supplicant support to run two instance with the same ip (br0) or
not?
2. Can I enable the external registrar for each instance?

Thanks
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