title: Limited number of clients used in federated learning
body: <p>I just started studying federated learning and want to apply it to a certain dataset, and there are some questions that have risen up.</p>
  <p>My data is containing records of 3 categories, each of which is having 3 departments. I am planning to have 3 different federated learning models for each category and treat the three department of this category as the distributed clients.</p>
  <p>Is this possible? or building federated learning models requires having thousands of clients?</p>
  <p>Thanks</p>