I think that with current  VirtualCam_unreal_xx linked compound you cannot do such thing because all the camera paths are for single camera so it can only take on path per time.

So you have two options :

1-Edit this compound yourself to add this feature.

2-Wait for aximmetry to add such feature if they agreed.

Also you can use channel out module to view video on other preview window 

Do you want this for preview purposes or you want five independent final video outputs as well?

For the first case you can find the MATRIX mode on the CAMERA control board.
However currently you have the following restrictions:
- You'll only see the virtual background for the active camera, since the Unreal module only renders one view at a time.
- For the other cameras you'll only see the talent from the proper camera position.
- You can only use two cameras in the Unreal scene. We'll extend it to four in the very near future. However five cameras was not planned, we'll consider it.