Wasn't aware of another mod, judging by the comments on it I would say that it doesn't affect NPC either. When I tested this in game, it didn't seem to apply the glow effect to NPC so I am describing it as player only.
Applying it to NPC is doable but time consuming. Maybe.
It's not all that time-consuming, really. It's just a matter of opening the Creation Kit while the mod is active, searching for khajiit NPCs under "Actors" and Ctrl+F4 to export their FaceGen data. Did that once for another mod that added glowing eyes for khajiit and didn't take more than 5 minutes. Most time-consuming part of the process is searching for each of the named khajiit NPCs, but with a list on hand it remains a relatively simple task.
6 comments
https://www.nexusmods.com/skyrim/mods/4779
They both replace the same meshes, and that one affects npcs as well as the player character.
Applying it to NPC is doable but time consuming. Maybe.
I'll give yours a test and come back to let you know what I find.