One of the drawbacks of SharePoint lists is that the data is flat. However, we can set up the SharePoint List and use the SubmitToSharePointList command to map comments from your InfoPath form to the SharePoint List. The result will be a repeating history of comments for each of the SharePoint List Items.
This document assumes you are familiar with qRules and the SubmitToSharePointList command. (If you’re not, here’s a good tutorial!)