Currently is not possible to be done by JIRA itself. However there is already an improvement request being raised in here: https://jira.atlassian.com/browse/JRA-32125
Feel free to vote at it to increase its popularity and add yourself as watcher to receive any latest updates from the developer and also feedback from other customer as well.
Maybe this free plugin would be a nice solution for your request?
You will be able to grant a 1:1 view of issues to your customers (non users) and see which issues are shared and also from who and when. Additional you can delete active shares or edit the availability
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