In Laserfiche 12, there were several filter options added for custom reports, and they are fantastic. One that is missing is "not in". An example of using this would be a report that lists all invoices that are 180+ days old. I currently have to use "is after" and set a specific date, which means each time I run the report I have to update the date. If there was a "not in" option, similar to the "is in" option, I could set a "last (x) days" so it is dynamic.