In your template:
// rolename could for e.g. be 'editor' or 'author' or 'administrator'
author_can( get_the_ID(), 'rolename' ) AND print "<img src="https://wordpress.stackexchange.com/questions/56658/..." alt="A kool badge!" />";
In your template:
// rolename could for e.g. be 'editor' or 'author' or 'administrator'
author_can( get_the_ID(), 'rolename' ) AND print "<img src="https://wordpress.stackexchange.com/questions/56658/..." alt="A kool badge!" />";