title: TortoiseGit filter for 2 user names
body: <p>I have tried to make a TortoiseGit report for the commit history, 
  i made it to exclude 2 users from the logs, i did so for one with: </p>
  
  <pre><code>^(.(?!username))*$
  </code></pre>
  
  <p>But i need to exclude an additional user to. How do i filter for 2 strings? </p>
  
  <p>I have already tried with following:</p>
  
  <pre><code>^(.(?!username|username1))*$
  </code></pre>
  
  <p>and </p>
  
  <pre><code>^(.(?!username))*$|^(.(?!username1))*$
  </code></pre>
  
  <p>ps. Only this filter format works for TortoiseGit</p>