A workstation is a physical or a virtual device that Dataguess runs on. Wherever Dataguess is installed and is running, can be considered as a workstation. A workstation will store any data about Dataguess that is running on that device.
By default, you have your local workstation (localhost), and you can create your user, dataflows, workgroups in localhost workstation. You can also copy other workgroups and dataflows from remote workstations to your localhost.