Per product settings – subscribing to certain list when certain product ordered

Hey there mate,
first thanks for great free plugin. However I’m missing some vital functionality, which I found in trello mentioned – per product settings. It would be great, to have ability to specify for each product list and groups, to which user should be added, when he purchases the product.

Are you working on this feature? Do you have some code samples? I would very much appreciate this functionality. Even thinking of writing some code, I don’t think it should be complicated.

Cheers there, keep up good work ??