By saying you are looking for a driver for X,
there are any Logitec drivers for OS 9???
I remember when I was thinking which webcam I should get in the OS 9 days, Logitec ones were out of question because they did not have any Mac drivers.
I've got iRez StealthFire Firewire cams instead.
I don't think Logitec makes any Mac drivers.
You might be out of luck with that Logitec cam.
Try to find third-party drivers.
I know there is a driver for a variety of Firewire webcams available.
Not sure about USB ones for OS X though.