You can assign a specific camera to VidiReports  in the camera parameter field,which is located in the advanced parameters of the configure tab, by entering a string that follows this syntax 

-for usb cameras : usb://<cameraUID1|cameraUID2>@WIDTHxHEIGHT/format , like the example below:


-for IP cameras, follow the standard HTTP/RTSP/etc. URI, for example : http://me:pwd@192.168.0.200:554/live.sdp