Currently, Jira's JQL/filter doesn't support (natively) a way of searching who commented on a specific issue nor all comments from a specific person.

Taking a look at the Community post below, it's possible to see that there are some add-ons that could perform this action:

• Atlassian Community - JQL for Commented by user and commented date

The two add-ons that seem to have that option are:

• ScriptRunner for Jira
• JQL Search Extensions for Jira - the JQL extensions

Even though there are add-ons that perform this, it would be great if Jira supporter that option natively.