user synch across multiple networks

I am planning to create a few multisite networks. each with a set of plugins designed for specific industry.

Is it possible to use one of the network as master and rest as sub to do User Synchronization across all of the network.

like

Multisite1.com (Master)
Multisite2.com (Sub)
Multisite3.com (sub)

On any subsite if user tries to create an account, he/she will always be redirected to Multisite1.com.

Is this possible using this plugin?