If you'd like to report on certain Task Types/Names per User with totals, this can be done from the Object Tree.
Either on multiple objects (task name totals are accumulated) or on a single Object (task total accurate).
If reporting on only one Object you can also calculate and show the totals of the event/task.
See here an example if booking people on a Task "Annual Leave" or "Vacation".
Report on one Object
Import attached template.