/lib/x86_64-linux-gnu/libiptc.so is in iptables-dev 1.6.0-2ubuntu3.
This file is owned by root:root, with mode 0o777.
It is a symlink to /lib/x86_64-linux-gnu/libiptc.so.0.0.0
/lib/x86_64-linux-gnu/libiptc.so.0.0.0