Hello Adrian,
I’m afraid this is not possible with the current s2Member.
Banks aren’t supported, only payment gateways like PayPal, Authorize.net, Google Checkout etc. They pay to your banks through these payment gateways (at least PayPal allows that).
If you want to receive payments with your bank you’ll have to make sure that your bank is supported through all the countries where you want to accept payments from.
And also you’ll have to integrate it with s2Member. However we can’t provide any help with that. You can hire a freelancer to do this for you though at websites like elance.com, freelancer.com, jobs.wordpress.net etc.
– Eduan