how to setup a parallel non-interfering network with one module?

Does the ID setting do this?

Yes, on a Zigbee network, it would allow for a different network to exits. So you can have two or more in range of each other.

Yes, a different “ID” value will help you form a separate network.

Considering “CM” is set to default value or have multiple channels enabled, Coordinator on second network will scan all enabled frequencies and choose the one with least interference for operation.

With first network operating in close vicinity, we can be certain that second network’s Coordinator will pick a different operating channel to reduce interference.

Digi Support