/usr/lib/liblightdm-gobject-1.so.0 is in liblightdm-gobject-1-0 1.2.1-0ubuntu1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/liblightdm-gobject-1.so.0.0.0
/usr/lib/liblightdm-gobject-1.so.0.0.0