WP Smush: Allows to filter the resize dimensions for a specific admin role

modify_resize_dimesnions.php

<?php
add_filter( 'wp_smush_resize_sizes', 'filter_resize_dimesnsion' );
function filter_resize_dimension( $dimensions ) {
	$user = wp_get_current_user();
	if ( ! empty( $user ) && in_array( 'custom role', (array) $user->roles ) ) {
		//The user has the "specific admin" role, modify the dimensions
		$dimensions = array(
			'width'  => 1440,
			'height' => 1440
		);
	}

	//return the dimensions
	return $dimensions;
} ?>