Hi Nicole-
Tags are limited to a single selection - so no multi-pick per attribute. However, as Kristen mentioned, you are really not limited to how many tags you use so you just have to balance how many tags you have, how many you require, and to what granularaity do you build them to be. Is this a metric tied to the person or to the program - because if it is at the person level, then are there rules to how long this attribute would remain true for the individual (i.e. once an orange, always an orange)? Answering those types of questions up front will help you get to your solution.
Thx