need two/multi special pricings setup for one customer.

I would like to have A MODUAL that can do the following requests: a customer login to see the group pricing (e.g. -10% off) that the customer belongs, and after login, the customer can see -10%off pricing and the MRP, that's the first request; and the second request is I would like to give the customer a special pricing (-30%) on selected products, so the customer logged in to see the (-10% off the list pricing ) pricing, and some items with special pricing (-30%). however, I cannot find either special pricing or existing customer group pricing can meet both requests since the special pricing or customer group pricing can handle the first request but in the meantime, one customer cannot belong to two customer groups so I cannot setup -30% off to this customer.
Can anyone please kindly advise if any extension can do both requests.
Thank you!

So you want to give additional 30% off to specific customer.
Of course if you do for customer group then it shall apply to all.

You can create custom message for that specific customer and it shall only be shown to that customer which you select.
You can use custom message pro extension for this.

https://www.opencart.com/index.php?rout ... n_id=22785