iRule to drop Public IP access to DNS Wide-ip

We have wide-ip "abc01.example.com" which we want only to access from internal user (private ip)

Do we have iRule to drop only public ip and allow private ip on that wide-ip?

So when nslookup to "abc01.example.com" via public ip, F5 drop
and when nslookup to "abc01.example.com" via private ip, F5 allow

Thank you