Mac Pro with four FireWire 800 connections

Can the new Mac Pro with four FireWire 800 connections (two on the front and two on the back) be used to connect 4 video cameras simultaneously? I use Canon HV40s.

The problem with video over firewire is that the video signals interfere when transmitted on the same fire wire bus. We have to assume that at least two fire wire connections are on the same bus. Therefore it won’t work.