/usr/lib/x86_64-linux-gnu/libluasandbox-inotify.so is in lua-inotify-dev 0.4+git20151119-1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libluasandbox-inotify.so.0.0.0
/usr/lib/x86_64-linux-gnu/libluasandbox-inotify.so.0.0.0