What about using a tabular inside \author{}
, just like in IEEE macros:
\documentclass{article}
\begin{document}
\title{Hello, World}
\author{
\begin{tabular}[t]{c@{\extracolsep{8em}}c}
I. M. Author & M. Y. Coauthor \\
My Department & Coauthor Department \\
My Institute & Coauthor Institute \\
email, address & email, address
\end{tabular}
}
\maketitle
\end{document}
This will produce two columns authors with any documentclass
.
Results: