Hello Sima,
I cannot see this as an option for this VI and you cannot access the library call, but you could always do this manually. You can run CAN Get Names.vi with a message name filter, and then concatenate the strings yourself for the elements as needed. This would just require a For Loop and some of the string functions to append the appropriate name to the channel, if it is not already there. This would require running Get Names for each message, but you would only need to do this for your initial setup.
I hope this helps.
Regards,
Angela
Applications Engineer