Hey,
No, you unfortunately do not get to choose what residence you want when you apply to be a CA. However, if you have an interest in a particular community, you should mention that in your interview/application. For example, if you love learning about different types of cultures and backgrounds, maybe Edwards would be great for you, since there is the 'International House'. But, you are still not guaranteed to get the res you want. Its the people that make a residence experience great, and as a CA, you have the upper in hand in shaping your community