When creating Private Reports you also have the ability to add in Control Breaks to seperate your Data. 

For example you may use this at Event Level to Identify Late Tasks in each Runbook across the overall Event. 

Control breaks can be added from the Actions Dropdown > Format > Control Break

The example below will show late tasks across all Runbooks. 

To begin with, add the filter of Late = Y, once this has been done add the control break, so each late task shows under the correct control break section. 

On clicking apply your report will be returned containing the control break which you entered.