So you aren't even able to connect to the camera from a Mac by browsing to its IP address using your web browser? (Leaving the iCamSource out of the equation.)
Do you have one of those AirPort Extreme Dual-Band routers that can support two WiFi networks, one private and one "guest" network? The "guest" network computers cannot connect to the private (main) network, and they usually cannot connect to one another, either.