I am not sure what you mean by the word FEEDBACK.
If you mean forum discussions or posts from a single user, you can access them as below:
For discussions ( ex: All discussions by @Emma Richardson) :
https://moodle.org/mod/forum/user.php?id=719311&mode=discussions&course=5
For all forum posts ( ex: All forum posts by @Emma Richardson) ::
https://moodle.org/mod/forum/user.php?id=719311&course=5
Note: user.php?id=719311 - 719311 is user ID of a student
course=5 - 5 is course ID