If user = author (in Post, Comment, Author Bio < Everywhere, for All authors), then
#author-name:after {
font-family: FontAwesome;
content: "f058";
font-size:18px;
font-weight: 400;
color: #4DB2EC;
padding: 0px 7px;
}
But how to make that condition without modifying wordpress core files?
Read more here:: How to add verified batch after the names of authors everywhere?