title: Run Gitlab-runner as multiple users for multiple projects on 1 server
body: <p>Lets say I have multiple projects located on 1 machine.
  Currently, the runner is configured to run as gitlab-runner user for all projects.</p>
  
  <p>Is there a way to run gitlab-runner as multiple different users and registering them for each project? ie: project1 user will run the runner for project1 only, project2 runner will run the runner for project2 only and so on.
  The reason to do this is to limit the access usage that the gitlab-runner user has on all the projects. </p>
  
  <p>Please advise or point me towards the light. Your assistance is greatly appreciated.</p>
  
  <p>Thanks in advance.</p>