GD Security Toolbox Pro is created with multisite support at its core. In the multisite mode, all plugin controls are inside the Network admin. All security features should be only under super admin controls and set for the whole network in one place only. So, if you run Multisite WordPress, the plugin configuration is the same as with normal WordPress, but from Network Admin and only for super admin administrators.
Events log is logging each event network blog and it can be used to filter events related to each blog in the network.