The smartform can be started via a link with this method. Condition for that is the **starter** role as well as the corresponding context role in the process to start the given process.
http://<server><:port>/loom-portal/client/todo/index.htm?startProcessInstanceByProcessDefinition=Wiki
oder
http://<server><:port>/loom-portal/client/processmanager/index4g.htm?startProcessInstanceByProcessDefinition=Wiki
After authentication the corresponding smartform is shown to the user, via which he can start like ususal.