This sounds like something you could do with a conditional value list.
If you haven't tried that before, you might read this knowledge base article: http://help.filemaker.com/app/answers/detail/a_id/5833/kw/conditional%20value%20list
Hello PhilModeJunk, sorry for the late response, this past week was horrible. Thanks a lot for the answer, I have never used conditional value lists like that, I did use something similar with portals but not for menus. I'm going to try to use it and post the results back.
If you can get a portal to show up with the values you want in your drop down, the same relationship can be used in your value list to show only related values.