No worries, we are open to any suggestions. What I think we are missing in this thread (and also the other one) is why exactly the feature is wanted.
3ds max has this feature built in since ages:
https://help.autodesk.com/view/3DSMAX/2022/ENU/?guid=GUID-556B3B1C-D62E-48F6-A633-DCF5172219B5Though this is meant to work with LUTs created with other Autodesk compositing apps like Flint, Inferno etc.
Newer max versions have this, too, as part of the OCIO pipeline.
In a VFX house that takes its color pipeline seriously, the comp department may give you a LUT that you load in your 3d app and use *only for the display, not the saved file*. This way they ensure that your image output is as neutral as possible and will match their grading once your output is added to their footage.
A typical example from the world of printing is that you can enable a proof preview in Photoshop. You still work in RGB but the preview will display colors as they would look *after* conversion to CMYK and the specific CMYK profile used in PS settings.
I remember working on a plate shot on an Arri camera and there was just no time for a preliminary grading or the guys were busy with other stuff. Film cameras mostly have an absurdly flat image output if ungraded. It was super hard to get the same look in rendering which I was expected to deliver, it had to match the plate 1:1. With a LUT preview, the plate I was rendering against and the rendered output would've been previewed in what the comp guys were doing with it later, giving me a much better idea of what the final result would look like. Without it, I had a hard time to figure out whether my colors were too dark, too bright, too saturated etc.
I think the OP just asks for this for convenience so he can have a quick preview grading quality while making sure the file saved would still be 'untouched' and the final color adjustments would be done at a later stage.
+1 from me, it just widens your audience, maybe not for archviz but there are people who need this in some pipelines. If you ask me, Corona should take color management more seriously. Max was pretty late to the party but now has complete OCIO support and is improving it. As always, all users will benefit from a broader use of color management even if they don't understand why it's there or what it does.
15 years ago only a few people knew why gamma correction is important, it took a few years until Max defaulted to 2.2. Then it took another few years to implement Reinhard compression and now we're getting new better looking renders with improved tonemapping from filmic, ACES, Agx etc.