How to filter Comments/mentions by any particular user in all issues of a project?

[ARYAN Pariyar]

I want a list of all comments made by a specific user across all the issues in the project. 
So that I can filter the comments and reply accordingly.

[Trudy Claspill]

Hello @ARYAN Pariyar 

Welcome to the Atlassian community.

Jira does not natively support an option to filter issues based on the author of comments. That would require a third party app. Are you willing to consider a third party app to meet your requirement?

Jira also does not support returning specific comments as part of the native filtering capabilities. Those capabilities are designed to filter/return a list of issues. Getting a result set that is just the comments might be possible with a third party app, though I have not looked for one that could specifically fulfill that need.

[ARYAN Pariyar]

Thank you for the answer.
It will be difficult to get a third party app, as my company may not spend extra for licenses. 

[Trudy Claspill]

You could alternately explore use of the Jira REST API to see if you could develop API calls to get what you want.

https://developer.atlassian.com/cloud/jira/platform/rest/v3/intro/