Conditionally show comments on a post based on the post author. Code specific to Genesis Framework. Regferehttp://codex.wordpress.org/Function_Reference/get_the_author

conditionalcomments.php

// Remove comments from posts
remove_action( 'genesis_after_post', 'genesis_get_comments_template' );

// Add comments back in if conditions are met
add_action( 'genesis_after_post', 'cd_conditional_comments' );
function cd_conditional_comments() {
  
  // Conditional Reference http://codex.wordpress.org/Function_Reference/get_the_author
  if ('Author Display Name' == get_the_author() ) {
		genesis_get_comments_template();
	} 
}