Notice that a multi-project application is different from a multi (micro) services application.
Onezio,
1-) Can play easy consume resource like a rest api?
The real question here is: can java/scala easily consume resources from a rest api? If there is a library that enables you to easily consume rest apis, than you can use it in your play application. The only thing that plays recommends is that you consume the services asynchronously.
2-) Could have more than one project or play server under the same project ?
You can have sub projects. I don't get what you want with more than one server under the same project. Could you please elaborate your problem?
HTH