There are no way to anonymise IP addresses in AWstats? If that true, I'll have a look into their code and provide a patch because such feature should be in AWStats core.
I dont know, i haven't checked this. Most of our customers do not use AWStats, they use Piwik, Google Analytics, ... I have not found any information in awstats conf files to disable ip adresses or anonymize IPs. So this was the way to handle it in our case - reset logs, anonymize at webserver logs.