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If the Canon printer is an actual Print Server, it should be as simple as putting in the IP address of the Canon device.
You may also need to change the Windows Network of your Mac, which you can do in System Preferences > Network > [Connection Type] (WiFi/Ethernet) > Advanced > WINS and change the WORKGROUP name.
B.
if you think I've been of some help. It's just under my name on this post