How to give node owner points

Hi, I posted this in userpoints http://drupal.org/node/1084542 then realized that is it more of rules question.

I think i have the basic idea down but still not able to figure out how to create the custom rules

You create a trigger when when the page is viewed. The action is when userpoints_download will deduct a point for the downloader. That works fine.

But I need to setup one more trigger.

In rules, there is no predefined option to provide a trigger for the node creator which is what I'm trying to get help on. The node creator would get a point per each download from each node he/she created.

Thanks for any help or advice.