// povolení dobírky jen pro uživatele s rolí member
add_filter( 'woocommerce_available_payment_gateways', 'vandaal_cod_enable_manager' );

function vandaal_cod_enable_manager( $available_gateways ) {
global $woocommerce;
if ( isset( $available_gateways['cod'] ) && !current_user_can('member') ) {
unset( $available_gateways['cod'] );
}
return $available_gateways;
}