From the workplace pane on the left select Projects > In Progress
To open the project simply double click on the project name or right click Open
Go to the Task estimations tab, where you can see the current list of translators and proofreaders that were assigned to the translation project.
To change a translator or proofreader select the name and click on the Change Translator/Proofreader button
Click on the Add individual and enter the e-mail for the translator you wish to assign.
The translator will get an e-mail notification and a notification message in his Text United Inbox where he can accept/reject the task.