/usr/lib/libnet6.so is in libnet6-1.3-dev 1:1.3.14-1ubuntu1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/libnet6-1.3.so.0.0.0
/usr/lib/libnet6-1.3.so.0.0.0