No, that feature has not been implemented. If you could vote for it or even supply more context and even full examples that will help us prioritize it sooner.
I voted onthis issue. It is important that we have this functionality since all simple create and single valued details can be created via Teiid and for updating multi-values details we might need to write a java code. So that can result in two different access points and channels.
Resolving this issue would definitely help in using Teiid for all of LDAP integration.
Do you have a preference on the representation of a multi-valued attribute - concatenated or an array?
+1 for array
This has been implemented for 8.8 and will be in the beta2 release.