Better handling of light leaks when converting negatives

When there is a light leak on a negative, Negative Conversion tends to be confused by it and tries to average the whole image towards the leak, making the normal area blue/green. It would be great if there was a detection/special handling for light leaks. Another approach I can think of is a generalization of negative conversion, where users could use an arbitrary mask as the source for negative conversion range.

In the attachment, there are 5 files:

1. a raw negative with a light leak

2. a normal raw negative from the same film

3. flawed image: positive version with the leak where image itself is in the blue/green tint (result of default Negative Conversion)

4. reference image: positive version without the leak as a reference

5. desired result: positive version with the leak where the color profile copied from (4). Ideally, I would get the same/similar result directly through Negative Conversion