The Event filter can be used to limit the events listed in the Event monitor window. Filters are an easy way to view only those events that you are interested in. For example, you may be interested in viewing events on a certain node or with a certain set id. This also prevents the Event monitor entries from growing to unmanageable numbers after a period of time.
The filters are located in the lower left corner of the Monitor Console. There are three fields and one button. The criteria for the filter is combined when multiple entries are applied. For instance if you want to only see events on a node in a certain directory, you would enter the node name in the From nodes field and the directory in the For directory field.