Remove the WP User Integration Settings metabox from events for user that do not have the 'manage_option' capability.

functions.php

<?php
// A function to remove the WP User Integration settings from events
// if the user account doe not have the 'manage_options' capability
// this capability is usually assigned to the Administrator role.
// Add this to your child theme's functions.php file or into a custom plugin

function ee_remove_wp_user_meta() {

	if ( !current_user_can( 'manage_options' ) ) {
	 	remove_meta_box( 'eea_wp_user_integration', 'espresso_events', 'side' );
	}
		
}
add_action('do_meta_boxes', 'ee_remove_wp_user_meta');