\documentclass[a4paper,11pt]{article}
\usepackage{CAR}
\begin{document}


\Abschnitt{Berichte von Konferenzen}{Berichte von Konferenzen}{berkonf}
\columnsep 20pt
\begin{enumerate}[label={},leftmargin=0cm]
\begin{multicols}{2}


%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%% FOR THE AUTHOR OF THE REPORT
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

\konfhinwitem{Name of the conference}
{City, Country, 17.02. -- 21.02.2014}
{url}

{\footnotesize

...
Here we have a nice report on the conference.
...

Maybe even with a photo:
%\begin{center}
%  \includegraphics[width=\linewidth]{participants.jpg}
%  \hfill\textsl{Conference photo.}
%\end{center}


\hfill Author (City)
}



\end{multicols}
\end{enumerate}


\end{document}