I managed some time ago to work with Lightwave's modeler (with the same issue), if I remember correctly, with this absolute pointer option.
The problem is that currently I don't have any virtual machine to test it. I will install one and test it.
Edit1: Tested, if you disable mouse integration (on the input menu when machine is running) wings camera will rotate ok. BUT I cannot see the mouse pointer on wings window. Can you see it?
I cannot find absolute pointer option on my virtualbox manager, maybe they changed this.
The problem is that currently I don't have any virtual machine to test it. I will install one and test it.
Edit1: Tested, if you disable mouse integration (on the input menu when machine is running) wings camera will rotate ok. BUT I cannot see the mouse pointer on wings window. Can you see it?
I cannot find absolute pointer option on my virtualbox manager, maybe they changed this.