You can use filters to perform real-time filtering of GeoEvents based on a specified set of conditions. To add a filter to a GeoEvent Service in ArcGIS GeoEvent Manager, drag the Filter element from the New Elements list or double-click it. You can configure the filter to support real-time event data filtering workflows.
For more information about filters, see Introduction to filters.
Step-by-step instructions for adding filters to a GeoEvent Service are included in the Introduction to GeoEvent Server Tutorial. You can also access the tutorial from GeoEvent Server tutorials.