Yes, a Lightroom plugin can be built to do this. However, based on the community response, a simpler approach would usually be to let Lightroom finish exporting first, then run an external script that reads your CSV and renames the exported files afterward.

That post-export method is often easier to develop and maintain than integrating custom CSV-driven naming directly into Lightroom’s export workflow. If your main goal is consistent final filenames, an external renaming step should achieve the same result with less complexity.

So: yes, it’s possible as a plugin, but a separate script after export is likely the more practical solution.