Dependency Injection - How to resolve a dependency based on the value and not type?

I have one interface and two classes (implemented from that interface) in my application as below:

public interface ISMSServiceProvider
{
    NotificationSentResponse Send(SMSMessage sms);
}

public class NexmoProvider: ISMSServiceProvider
{
    NotificationSentResponse Send(SMSMessage sms);
}

public class TwilioProvider: ISMSServiceProvider
{
    NotificationSentResponse Send(SMSMessage sms);
}

At some places in my application I need to use NexmoProvider, and at some places TwilioProvider. That's been decided based on the value of a variable of following enum:

public enum NotificationProvider
{   
    Twilio = 1,
    Nexmo = 2
}

I am using service stack in my application, and having following code to resolve the dependency:

container.RegisterAutoWiredAs<TwilioProvider, ISMSServiceProvider>();

But as you can see there is nothing in ISMSServiceProvider that would allow me to register two different types at the same time.

Could anyone please suggest what changes I may need to do in below structure to enable me using either of Nexmo or Twilio provider classes at runtime?