title: Sonata User - Security on custom field
body: <p>I used SonataUser with FOSUser to manage my users and created a custom field <code>company</code> to attach each one to a given company.</p>
  
  <p>Now I'd simply need to give users the ability to manage only users attached to the same company:</p>
  
  <pre><code>user1 company1
  user2 company1
  user3 company2
  user4 company2
  </code></pre>
  
  <p>Example: user1 should be able to list/edit only user1 &amp; user2</p>
  
  <p>Should I use ACLs ?</p>
  
  <p>Can you point me to the right direction or tutorial to customize SonataUser for this purpose ?</p>