Masquerade client IP

Hi, we have some clients that only accept requests from it’s region.
To deal with this restriction, I’m installing a kong instance in the customer’s region to proxy my requests.

What I need to do, now, is kong masquarade requests in a way it reaches the customer’s API as it was originated from kong’s server.

Is there a way to do it?
I installed kong via docker, so my setup has two containers: database and kong.