You can change a task assignee at the point of project creation.
- In the project creation dialog box,
                            after specifying the workflow to use for the project, you can change the
                            users assigned to the various steps within the chosen workflow. Choose . The Change Assignees dialog box
                            appears.
- Choose the workflow step from the drop-down menu.
- Choose the user or users to whom you want to assign the step. Only
                            users of the project locale and workgroup are available for
                            selection.
- Click OK.