Currently you have to scroll through the entire list of Fuflillment plans to select what you want, it would be much easier to use the include only or exclude only advanced search that's available on most tables/fields in Infoplus.
Thank you for the feedback, George.
It looks like this was a simple oversight in the setup of this field on the Infoplus backend. We'll adjust that in this week's maintenance release. If all goes according to plan, you should start to see the Advanced option available to you this Friday morning.