I have a content type called Task, where I add tasks. After task being completed, I would like the node author to rate his satisfaction using Fivestar field.

How to enable voting on this satisfaction rating field by node author only on his task but others can't vote, they can see his/her vote.

I have a content type called Task, where I add tasks. After task being completed, I would like the node author to rate his satisfaction using Fivestar field.

While viewing the node (not in edit mode), how to enable voting on this satisfaction rating field by node author only on his task but others can't vote, they can see his/her vote.