You can simply write:
That's the usual convention how @author tag is used in all Javadoc-style tools.Code:@docauthor Some Name <firstname.lastname@example.org>
The current JSDuck implementation for both @author and @docauthor is to simply accept anything until the end of line.
If you want error reporting, you can implement your own @docauthor tag and pass it to JSDuck through --meta-tags option. The custom implementation will then override the builtin one. See Custom tags page in JSDuck wiki.