Do I need a third party app or can I just write a query using JQL?

[Colleen]

I have a department head requesting to be able to search for tickets having comments from specific users. For example, she wants to pull all tickets where she is mentioned (or any other member of her team), also sorted by time of response. 

I know this can done by using 3rd party apps like User Mentioned JQL or JQL Extensions for Jira, but I don't want to have to pay for these. Is is possible to do this just with JQL and create a filter for her to reuse?

[Trudy Claspill]

You asked about a couple of things in your post.

1. Ability to search for issues that have a comment from a specific user.

That can be done by using the "commentedBy" field in your JQL to search based on the author of the comment.

2. Ability to search for issues with specific "mentions" in the comment content.

Jira Cloud does not natively support searching for a "mention" in JQL.

3. Sort by time of response.

I'm not sure exactly what you are referring to for "time of response". If you are referring to timestamps for Comments Jira does not natively support sorting issue search results by that as issue can have multiple comments and sorting search results would not know which comment timestamp to use to sort the issues.