Personalize content for specific WordPress or LearnDash users using WordPress Shortcode

functions.php

// Show personalized content to students
add_shortcode( 'sv_personalize', 'nt_student_specific_content' );
function nt_student_specific_content( $atts , $content = null ) {

	if( !isset( $atts['values'] ) ) {
		
		return $content;
	}

	$atts['values'] = preg_replace('/\s*,\s*/', ',', $atts['values']);

	$users = explode( ",", $atts['values'] );
	$current_user = wp_get_current_user();
	
	if($atts['field'] == "email") {
		foreach($users as $user) {
			if($atts['partial']) {
				if(strstr($current_user->user_email, $user) !== false) {
					return apply_filters( "sv_personalize", $content );
				}
			} else {
				if($current_user->user_email  == $user) {
					return apply_filters( "sv_personalize", $content );
				}
			}
		}
		return false;
	} else {
		if( in_array( $current_user->user_login, $users ) ) {
			
			return apply_filters( "sv_personalize", $content );
		} else {
			
			return false;
		}
	}
}

Add the above code in the end of your theme's function.php file and then this shortcode anywhere on your site.

If you want to show content based on user email then add comma separated values in match entry and field as email.
You can also add set a partial match (true/false) parameter this will perform partial matches on email like test3 this will show the content to any user with having test3 in their emails

Option 1 match by email

[sv_personalize match="[email protected], [email protected], test3" field="email" partial="true"]
This content will be displayed specifically to users with username 1 and username 2
[/sv_personalize]

Option 2 match by username

[sv_personalize values="username1, username2" field="username"]
This content will be displayed specifically to users with username 1 and username 2
[/sv_personalize]