If you do not want to be tracked by google analytics across any servers anywhere on the internet, then you can control that, per computer, by making it so the host to which the analytics software sends it data cannot be reached. The easiest way to do this is by editing your host file or equivalent as follows:
127.0.0.1 www.google-analytics.com ssl.google-analytics.comAnother option is to block those hosts in a firewall configuration.