You could make a list with several instances of %XSLTRANSFORM% like this:
%XSLTRANSFORM{xsl="TWiki.SablotronXsl",xml=
Mark Delcher
Unix installation
Network installation
}%
%XSLTRANSFORM{xsl="TWiki.SablotronXsl",xml=
Kyle Strohm
Install workstations
Install Windows
Install Netware
}%
But you might just as well do it with a single %XSLTRANSFORM%:
%XSLTRANSFORM{xsl="TWiki.SablotronXsl",xml=
Mark Delcher
Unix installation
Network installation
Kyle Strohm
Install workstations
Install Windows
Install Netware
}%