B1if Event Sender filter out UDO and UDT

How do I filter out UDOs and UDTs? 

I have been monitoring the SEVT table and noticed a large amount of UDOs that seam to cause our B1if scenario for Pick Lists to take some time.  I want to filter out the large amount of UDOs and UDTs that are filling up the SEVT table.  The only problem is the ObjectType field in SEVT table all have -3 followed by the ObjectType.