Formula for Assigning Reps Based on Cities in Territory List

Hi! I have a list of companies with cities and states that have been enriched. I want to use a formula to assign these to reps based on their territories. However, the reps are assigned by city, not state. Is there a way I can ask Clay to refer to another list of cities when building a formula to assign a lead to a reap (i.e., If /city is equal to one of these 200 cities, list Rep 1). Thanks!