Setting Up Another Network Exclusively For a SoundGrid System

What is the best way to create another Ethernet network on my MacBook Pro for exclusive use by my SoundGrid system?

Will me existing and active public-facing Ethernet network impede my SoundGrid-specific Ethernet network if both Ethernet networks are active? My guess is “no”, since the Ethernet networks do no share packets. However, could this still impede SoundGrid performance for some other reason?

If so, how do I mitigate SoundGrid network performance issues?

Thank you.