Different coupons

No.

Hello Claudio Sanches,

I appreciate for the work you have done. But if possible can you do a favor to add a additional functionality to add multiple coupons for multiple gateways? I and many of the people using this plugin will be glad if you do so. Thanks in advance.

It is not currently possible.
I need to develop it and need free time.

Version 2.0.0 of the plugin allows you to apply a different value for each payment method.