Auditing EMC Isilon has been supported since Change Auditor 6.5, however it requires some manual configuration. Please see the following section from the Change Auditor for EMC User Guide for information on what needs to be configured:
https://support.quest.com/technical-documents/change-auditor-for-emc/6.7/user-guide/emc-isilon-auditing?ParentProduct=936
If there are no Isilon events after performing the steps as outlined in the User Guide, it could be due to the path names in the audit template not matching what is listed in the EMC Isilon Console as per the following KB article:
https://support.quest.com/change-auditor/kb/176069.