Yes but does the case holding the camera have some kind of ring around it to hold a ND filter? I have only seen videos of the Thermo camera so its hard to tell for me. I believe the lens guard is in the shape of a square and fits the whole camera?
Not having the Thermo I only see it comes with a case\cover for the camera that you have to take off before using. I wonder if someone with the skills and a 3D printer could print something close to it that could be fitted with Neutral Density Filter from Lee ND Gel Sheets? Lots of photographers make their own for full size cameras.