title: limit choices in drop downs in django rest browsable api
body: <p>Is there a way to limit what fields are populated (such as in dropdown selectors or list selectors) in the <strong>DRF browsable API</strong>? </p>
  
  <p>Below is an image example of how DRF is suggesting choices of "projects" to the user that he should select. However, the logged in user may or may not have access to these projects, so I'd like to get control over what shows up here! It seems that the default behavior is to show all related objects.</p>
  
  <p><a href="https://i.stack.imgur.com/4fMkv.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/4fMkv.png" alt="enter image description here"></a></p>
  
  <p>It would be really useful if there was a way to link the objects populated in these fields to be set according to a <code>get_queryset()</code> function.</p>
  
  <p>This page seems to hint that it might be possible, I just can't find an example of how to do it: <a href="http://www.django-rest-framework.org/api-guide/filtering/" rel="nofollow noreferrer">http://www.django-rest-framework.org/api-guide/filtering/</a></p>