An issue can be unassigned or can be assigned to one user at a given time.
You can assign an issue to a user by editing an issue in an issues list. The user must have already been added as a user to your Microsoft Windows SharePoint Services site.
To assign an issue to a user
- On the top link bar, click Documents and Lists.
- Click the issues list that contains the issue you want to assign.
- Click the title of the issue.
- Click Edit Item.
- Click the drop down list for Assigned To to look up and select the display name for the user to whom you want to assign the issue.
- Click Save and Close.