Hello Vinicius, you can use a Favorite Filter gadget with a JQL filter for this user with a createddate parameter or you can use the Activity Stream as a partial workaround (Where you can filter by this user and will show all activity related to this user)
Assuming you just want that user to be shown all issues currently assigned to them, it would be easy to show the date in which each of those issues had been modified in any way, despite of the fact that it is not the same than the date in which the assignment occurred (it will be the same date if the last action performed on the issue was the assignment).
In order to achieve this:
While these steps do not produce what you intended to do on your original request, I think the date of each issue's last update can be used with quite similar effects than the date in which the issue was assigned.
Badges are a great way to show off community activity, whether you’re a newbie or a Champion.Learn more
Connect with like-minded Atlassian users at free events near you!Find a group
Connect with like-minded Atlassian users at free events near you!
Unfortunately there are no AUG chapters near you at the moment.Start an AUG