Weekend Learning: Adding more security to Oracle Workflow

If you're a regular reader of this blog, you'll know that the Oracle Workflow product is near and dear to my heart for several reasons, so when I stumbled upon MOS note 965413.1 my curiosity was captured.  This note outlines several options for making the Workflow product more secure by limiting the amount of data returned to the user based on the partition that the data resides in, but I think the real benefit of this might be the suggestion you can add your own security sets on these data objects which may yield some positives if you're using the Workflow product quite a bit and need to segment your data returns.  How would you use this type of extra security in the Workflow product?