Allow Customer to delete a task

Summary

Surface delete capability to customer using a report in CP

Content

Hello,

I have a report that shows a logged in contact a list of tasks assigned to the contact.  This report is surfaced in the customer portal.  I want to give the contact the ability to delete tasks they are no longer interested in doing.  When I add a delete link to the report in OSvC, it doesn't surface on the customer portal through the Grid widget.

How do I allow a logged in contact to delete a task from the list? or even mark it for deletion, so I can filter it out of the report?