Yes, Security Monitor Pro will view your cameras from two different DVR's.
Make sure your DVR is on the supported list:
https://www.deskshare.com/ip-cameras-manufacturers-models.aspx
Add both DVRs and select the camera number. You can mix and match cameras between multiple DVRs.
If your DVR is not listed, we can create a profile for it if you can make it accessible online. Please fill out this camera request page:
https://www.deskshare.com/camera-request.aspx