Implementation of a complete History-Search over the current and past Issues

Greetings from Germany!

We need a possibilty to perform a "complete Assignee-History-Search" which would present us all the Issues a certain User was ever involved in:

• either as a "Assignee", a "Creator" or only a "Commenter" of a Issue.

At the Moment, the Issue Navigator can only find Issues of a certain User if he is/was a Creator of a Issue or is a current Assignee.
A Search for the User's Name in "Comments" (in order to locate his Involvement) doesn't deliver the wanted Results as well.
If a User was a Asignee of a certain Issue at the past, his "Involvement" cannot be found - to my Opinion, a Implementation of Possibilty to search the COMPLETE "Issue-History" per User is a crucial Feature JIRA must have.

Greetings,

Alexander