Thats right. Here is where it gets difficult for me to understand. I have a schedule with 5 milestones. Some tasks in the project need to be done by the first milestone. The next set of tasks the second milestone, etc. The custom filter would need to identify each set of tasks for each milestone. Is there a formula on Pojects that can do this? If you would like, I can send you my schedule so you can understand what I am doing. You can send me an email to aagent87@gmail.com and I will reply with my schedule.