No, it is not. If you want to install the mod via the "symlink" method (which is actually creating something called a "directory junction" in Windows), you need administrator privilleges to do that. If you do not want that, or do not have those, the alternative installation method (by copying the files to the game directory) works just fine without administrator privilleges, but - of course - consume twice the amount of disk space.

Unfortunately, Windows - unlike Linux - does not support creating symlinks to directories without administrator privilleges or modifying the registry.