With ClickGUARD you can apply protection and optmization rules to clicks coming from VPNs / proxies only by using the "proxy" condition. This option is available for Advanced Rules.
Ad clicks can come from IP addresses that belong to a public VPN, proxy or a Tor browser.
To apply a rule to clicks coming (or not coming) from a proxy, turn on the "proxy" condition and specify if clicks should be coming from a proxy or not:
In the example above, rule will apply to ad clicks that are not coming from an IP that does not belong a proxy / VPN or Tor browser.