Sandeep,
Yes, the 8196 can distinguish between two different PXI devices having the same PCI device/vendor ID, and they will be assigned unique resources by the BIOS. The BIOS doesn't really care what the PCI vendor/device ID is, those IDs are used by the OS to associate a driver with a card.
If you are using LabVIEW there is a property node that has a VISA resource name as the input and a slot number as the output. I'm not sure of the exact implementation details. You can see an example
here.
Collin