Cloaking feature is available within the Tools tab. You have the ability to create custom filters that can be applied to your Campaigns.
If you wish to list multiple IP ranges, make sure to separate them by comma.
Upon creating a Campaign, navigate the Filters settings and enable Cloaking. You will be able to choose one of your pre-set Cloaking rules from the drop-down list. You can choose to either include or exclude these ranges from the stream.
You may create several streams within one Campaign and apply separate filters and Cloaking rules to each one of them.