/usr/lib/x86_64-linux-gnu/liblcgdm.so is in liblcgdm-dev 1.8.10-1build3.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/liblcgdm.so.1.8.10
/usr/lib/x86_64-linux-gnu/liblcgdm.so.1.8.10