Reply To: Filter Coupons by Product Tags

[Soft79]

You can use the following filter:

add_filter( 'woocommerce_coupon_is_valid_for_product', 
  function ( $valid, $product, $coupon, $values )
  {
    //Make $valid true or false depending on the conditions...

    return $valid;
  }, 10, 4 );

And program accordingly.