Hi there,
Thank you for posting.

before I post the code, i want to clarify one thing, except the “Network administrator(SuperAdmin)” all other roles are specific to the site. So a user who is Editor on site 1 may not have the same role on site 2.

For the code part.

/**
 * Redirect users to main site home page if they are logged in and don't have the required role on the sub site
 */
function buddydev_check_redirect_roles_on_subsite() {

	if ( is_main_site() || ! is_user_logged_in() ) {
		return ;//no need to do anything on the main site or if the user is not logged in?
	}

	//this is incorrect way to do things, instead of role, please use the
	$roles = wp_get_current_user()->roles;

	$allowed_roles = array( 'administrator', 'editor' );

	$found = array_intersect( $allowed_roles, $roles );

	if ( empty( $found ) ) {
		wp_redirect( network_home_url('/') );
		exit( 0 );
	}

}

add_action( 'template_redirect', 'buddydev_check_redirect_roles_on_subsite', 0 );

You can put it in your functions.php or if using BuddyPress, you can put it in your bp-custom.php

Hope that helps.

Regards
Brajesh