Any item assigned to a sprint which corresponds to the current iteration path for the team will be found.
Civil, Small Claims, Civil. If you are not sure what the case type is for your case try both. Advisable, Domestic, Probate.
For example, if a team is on Sprint 5, then the query will return items assigned to Sprint 5.
Later, when the team is working in Sprint 6, the same query will return items assigned to Sprint 6. Note For the CurrentIteration macro to work, the team must have selected an Iteration Path whose date range encompasses the current date.