Fine-grained risk security based on the JIRA user group
Here is a link to the original one - http://xpmc.uservoice.com/forums/248937-general/suggestions/6197688-fine-grained-risk-security-based-on-the-jira-user
Laszlo Kosa commented
Please also consider what external users can already access through standard issue search. No real use limiting access on the board if they can access the hidden issues in a JQL (which can be clicked together in 3 seconds).