Not quite the same thing, but Windows has the concept of multiple named streams in the same NTFS file - https://docs.microsoft.com/en-us/windows/win32/fileio/fi

Not quite the same thing, but Windows has the concept of multiple named streams in the same NTFS file - https://docs.microsoft.com/en-us/windows/win32/fileio/file-streams https://docs.microsoft.com/en-us/windows/win32/fileio/file-s... So you could write a log file with separate streams for different verbosity levels.