By default, WooCommerce doesn’t log the user who adds a coupon. But you can enable this using a simple code tweak to track and display the coupon's creator. Step 1: Open your theme’s functions.php or a custom plugin file. Step 2: Add the below code snippet:

// Save the creator ID
function save_coupon_creator($post_id) {
    $user_id = get_current_user_id();
    update_post_meta($post_id, 'coupon_creator', $user_id);
}
add_action('woocommerce_new_coupon', 'save_coupon_creator');

// Show creator on coupon edit
function display_coupon_creator($coupon) {
    $creator_id = get_post_meta($coupon->get_id(), 'coupon_creator', true);
    if ($creator_id) {
        $name = get_the_author_meta('display_name', $creator_id);
        echo 'Coupon Creator: ' . $name . ''; 
    } 
} 
add_action('woocommerce_coupon_options_usage', 'display_coupon_creator');

To make this visible in your coupon list table, follow these steps: Step 1: Add this code to your theme/plugin:

// Add "Creator" column
function add_coupon_creator_column($columns) {
    $columns['coupon_creator'] = __('Coupon Creator', 'domain');
    return $columns;
}
add_filter('manage_edit-shop_coupon_columns', 'add_coupon_creator_column');

// Display name
function display_coupon_creator_column($column, $coupon_id) {
    if ($column === 'coupon_creator') {
        $id = get_post_meta($coupon_id, 'coupon_creator', true);
        echo $id ? get_the_author_meta('display_name', $id) : '-';
    }
}
add_action('manage_shop_coupon_posts_custom_column', 'display_coupon_creator_column', 10, 2);

// Make sortable
function make_coupon_creator_column_sortable($columns) {
    $columns['coupon_creator'] = 'coupon_creator';
    return $columns;
}
add_filter('manage_edit-shop_coupon_sortable_columns', 'make_coupon_creator_column_sortable');

// Add sorting logic
function modify_coupon_creator_column_sorting($query) {
    if (is_admin() && $query->is_main_query() && $query->get('orderby') === 'coupon_creator') {
        $query->set('meta_key', 'coupon_creator');
        $query->set('orderby', 'meta_value_num');
    }
}
add_action('pre_get_posts', 'modify_coupon_creator_column_sorting');

Now, your WooCommerce admin area shows and sorts coupons by their creator — helpful for accountability and user tracking.