KyeDuo:

I would love it if you could filter by both cart type AND name if you used a named cart in the filter for the loaders/unloaders.
This would make for a very powerful but easy to use filter system.
A button in the GUI to either exclude or require the name on the cart/train would improve this as well.

http://www.railcraft.info/forum/?mingleforumaction=viewtopic&t=723.0#postid-2842