ApplicationModule.cs

    public class ApplicationModule : Module
    {
        protected override void Load(ContainerBuilder builder)
        {
            builder
                .RegisterModule<AttributedMetadataModule>();

            builder.Register<SenderFactory>(c =>
            {
                var context = c.Resolve<IComponentContext>();

                return (client) =>
                {
                    var sender = context.Resolve<IEnumerable<Meta<ISender, ClientMetadataAttribute>>>()
                        .First(x => x.Metadata.Client == client).Value;

                    return sender;
                };
            });

            builder
                .RegisterType<EmailSender>()
                .As<ISender>();

            builder
                .RegisterType<SmsSender>()
                .As<ISender>()
                .WithMetadata("Client", "sms");

            base.Load(builder);
        }
    }