I should say, I'm "hoping" for users. :-)

The program is a single-user tool for a W32 platform. It installs in a user-specified/owned folder and therefore, even with the same relative path name, would be unique from user to user. When the need arises to get this "Enterprise-ready", it will still be a matter of each user's config files (and thus his/her log file) being in their own directory/folder. You make a good point that I hadn't considered directly.

But also, by your going along with "one log file per user/run", it looks okay to you to proceed with this sort of STDERR inheritance scheme. :-)