Here is a quick hack I put together (I assumed that you only have NAME, ID, and TIME as fields). 
my $time = 50;
while (<IN>){
@tmp_split = split /:/,$_;
# Print the previous entry if valid
print OUT "NAME:$tmp_hash{\"NAME\"}ID:$tmp_hash{\"ID\"}TIME:$tmp_hash{
+\"TIME\"}" if ($tmp_split[0] eq "NAME" && $tmp_hash{"TIME"} > $time);
# Put the values in a hash for storage
$tmp_hash{$tmp_split[0]}=$tmp_split[1];
}
# Print the last entry if valid
print OUT "NAME:$tmp_hash{\"NAME\"}ID:$tmp_hash{\"ID\"}TIME:$tmp_hash{
+\"TIME\"}" if ($tmp_hash{"TIME"} > $time);

[download]
I hope that helps.

In reply to Re: Deleting a line from a file by c-era
in thread Deleting a line from a file by Anonymous Monk

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