Ok so you should constrain either the listview or the entity.
- if it is just for this listview and the user normally can see all the event you should set an xpath constraint on the list view.
- If at all times the user can only see the events of its own level you should punt an xpath constraint on the entity(with entity acces)
The xpath should look something like:
[YourModule.RunningEvent_Runninglevel/YourModule.Runninglevel/YourModule.Runninglevel_Account = '[%CurrentUser%]']