title: quartz grails multi-entity environment
body: <p>I have a web-app (grails 2.3.5, quartz plugin) with multiple users. Now I want that my users can schedule jobs using quartz. I wonder what the best approach is to separate Triggers from one user from the triggers from another user. </p>
  
  <p>e.g. provide a list of all scheduled tasks for a given user</p>
  
  <p>Are there any recommendations how to make this differentiation?</p>