Nope, it's not supported.
Here's an excerpt from org.springframework.transaction.annotation.SpringTransactionAnnotationParser
public TransactionAttribute parseTransactionAnnotation(Transactional ann) {
RuleBasedTransactionAttribute rbta = new RuleBasedTransactionAttribute();
rbta.setPropagationBehavior(ann.propagation().value());
rbta.setIsolationLevel(ann.isolation().value());
rbta.setTimeout(ann.timeout());
rbta.setReadOnly(ann.readOnly());
rbta.setQualifier(ann.value()); // <<--- this is where the magic would be
// if it was there, but it isn't