\setuppapersize[A5][A4]
\setuparranging[2UP,rotated,doublesided]
\setuplayout[margin=1cm,width=middle,height=middle,topspace=0cm,backspace=1.2cm]
\setupcolors[state=start]
\showframe
\showgrid

\definetwopasslist{tableoffset}

\gettwopassdata{tableoffset}

\iftwopassdatafound
  \definelayout[\number\numexpr\twopassdata+1\relax][header=\the\dimexpr\headerheight+2\lineheight\relax]
\fi

\gettwopassdata{tableoffset}

\iftwopassdatafound
  \definelayout[\number\numexpr\twopassdata+1\relax][reset]
\fi

\setuplinetable[nx=2,width=.125\textwidth]

\definehead[tablehead][section]

\setuphead[tablehead][page=yes,before=,after=\blank]

\starttext

\dorecurse{5}
  {\section{Section #1}
   \dorecurse{2}{\input tufte\par}}

\tablehead{List des membres}

\lazysavetwopassdata{tableoffset}{1}{\pagenumber}

\startlinetable
\NC firstname \NC lastname \NC phone       \NC mobile      \NC postal code \NC city    \NC address        \NC\NR
\NC John      \NC Jonhsons \NC 0800/987654 \NC 0171/123456 \NC  12345      \NC New TeX \NC Meta street 12 \NC\NR
\stoplinetable

\lazysavetwopassdata{tableoffset}{2}{\pagenumber}

\page

\dorecurse{3}
  {\section{Section #1}
   \dorecurse{2}{\input tufte\par}}

\stoptext