The template doesn't currently support this, but we will try to incorporate this in the future.
In the meantime, you can easily modify the template. This is the place to look at:
\ifcolmfinal
\lhead{Published as a conference paper at COLM 2024}
\def\And{\end{tabular}\hfil\linebreak[0]\hfil
\begin{tabular}[t]{l}\bf\rule{\z@}{24pt}\ignorespaces}%
\def\AND{\end{tabular}\hfil\linebreak[4]\hfil
\begin{tabular}[t]{l}\bf\rule{\z@}{24pt}\ignorespaces}%