/usr/lib/liblwipv6.so.2 is in liblwipv6-2 1.5a-2ubuntu2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/liblwipv6.so.2.1.0
/usr/lib/liblwipv6.so.2.1.0