In Acunetix v13, we simplified the integration with the OpenVAS network scanner and you can now integrate directly using the Acunetix user interface. In addition to that, Acunetix v13 Premium customers can create an unlimited number of network scan targets and perform an unlimited number of network scans. All web and network vulnerabilities can now be easily managed from within the Acunetix user interface.
You can configure OpenVAS network scanner integration on the Network Scanner Settings page. You can find more information about this process here.
When you configure OpenVAS network scanner integration, you have an option to create targets that will only be scanned for network vulnerabilities (Network Scans only). You will not be able to scan these targets for web vulnerabilities and these targets will not be counted against your license limits.
Note that you can scan web targets for both web and network vulnerabilities.