print grep /^(?:[^,]*,){4},{3}\d,0,\d/, <DATA>; 

__DATA__
1,2,0,First Test,,,,0,0,7,,,,,,,,,,,
1,2,0,Starting madvise bss tests,1,buffer,G,1,1,0,Y,,,P,G,,,,,,
1,2,0,Starting madvise bss tests,2,buffer,G,1,2,0,Y,,,P,G,,,,,,
1,2,0,Starting madvise bss tests,3,buffer,G,1,3,0,Y,,,P,G,,,,,,
1,2,0,Second Test,,,,0,0,7,,,,,,,,,,,
1,2,0,Starting madvise bss tests,1,buffer,G,1,1,0,Y,,,P,G,,,,,,
1,2,0,Starting madvise bss tests,2,buffer,G,1,2,0,Y,,,P,G,,,,,,
1,2,0,Starting madvise bss tests,3,buffer,G,1,3,0,Y,,,P,G,,,,,,