I do not know how feasible this is.
I often play Elite Dangerous windowed with a browser opened. This is not compatible with the 4c/EyeX.
The issue is the software tracks your eyes position on the relative to the monitor (actually the eyetracking bar).
Would it be possible to have the eyes tracked relative to the window?
To do this I think the drivers or Infinite Screen would need to know the window position and scale, and then translate the eye position within that window before being passed to ED.
This also might be problematic give the calculations I think are now done on chip, but I guess it’s possible an additional driver layer could be enabled for window translation mode.
This would then allow the Tobii to work with software running in windowed mode.