Yes of course. You can install Starkit on any computer or virtual machine hosted anywhere on the world. You don’t need to be in the same network with your Starkit appliance.
Remember that “Starkit brings back your lost privacy without compromising the benefits of the cloud”.
You access Starkit email, calendars, contacts, cloud storage, files and use it for secure communication as you would use any similar cloud service (like Gmail, Dropbox or Skype). The provider is your own Starkit appliance which you own and control and can be anywhere on the world i.e. you are in Russia and your Starkit appliance is on the island of Cyprus. You still have the same benefits and exact same performance, plus privacy and security.