Please follow the below procedure to view tasks details of particular user.
1. Navigate to Leads > Manage Tasks
2. On opening Manage Tasks you’ll see all tasks created on your account.
3. Click on Filter by Owner drop down list and select a desired user name to view tasks details of a particular user.
After selecting required user, you can view the tasks and its status. Also, its possible to do additional actions against a task as described below.
1. Edit: To edit any task details hover the mouse on actions button against a task click on Edit.
2. Mark Open: To open any tasks, hover the mouse over actions button click on Mark Open.
3. Mark Complete: To mark a task as completed, hover the mouse over actions button and click on Mark Complete.
4. Delete: To delete any task hover the mouse on actions button Click on Delete.