/usr/lib/x86_64-linux-gnu/libiw.so is in libiw-dev 30~pre9-8ubuntu1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /lib/x86_64-linux-gnu/libiw.so.30
/lib/x86_64-linux-gnu/libiw.so.30