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?
Hard to say by the advertisement picture of the thermo but my lens cap for the regular camera measures 2 CM inside Dia. So just measure your thermos ring and it might be close enough.
Sorry @jbuy41 I've had my thermal for a year now and there hasn't been any development put into NDs on the thermal. I end up doing adjustments in post or LUTs
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.