Previous topic that outlines the issue exactly:  http://forums.manageengine.com/#topic/49000002680013

In a previous post you stated this feature was going to be added to the road map as the solution (which was posted 3 years ago!).  Is there any reason this hasn’t been added yet?  Can you not just run the filters through the alerts when they are triggered since time is the reason for alerts triggering off raw data?

My scenario:

I've setup a PowerShell script to be triggered when there are more than 20 errors in a 60 minute time period in the Application logs.  However it's triggering from error events that I've already filtered out which is really annoying.  So now I've got to rework my script to do the filtering that ELA will not do.

Can you explain why this has not been corrected yet?