Using ManyCam Virtual Webcam for Multiple Inputs Into vMix

Does anyone know how to assign specific cameras via the mobile app to a unique ManyCam Virtual Webcam?

For example, four mobile app enabled cameras:
Mobile App 1 & Mobile App 2 = ManyCam Virtual Webcam I
Mobile App 3 & Mobile App 4 = ManyCam Virtual Webcam II

I am attempting to use these as inputs in vMix. The issue is that after creating the Virtual Webcams, there doesn’t seem to be a way to assign specific mobile apps to a specific virtual webcam.

Thanks in advance for your help and suggestions!