I've created a very simple workflow with two actions, Request data (using a MultiText variable to get text from another user, not me) and Update item (with the same variable to a column in the same SharePoint list with versioning turned on).
For the life of me, I can't figure out why when the workflow is completed and I clicked "View Entries", I see my name for the comment, Created at and Last modified. It really should show the other user's name because the comment looks like it is from me
Ben Swee (1/15/2015 10:04 AM): This is a comment from me again!
Created at 1/15/2015 10:01 AM by Ben Swee
Last modified at 1/15/2015 10:04 AM by Ben Swee