Others have suggested various methods for parsing your logfile, to which I would add a suggestion to try looking at substr, especially if you're not yet totally comfortable with regular expressions and the uses thereof (and assuming that your records are fixed-width).

You don't say if you're planning to generate this table dynamically or to store it: if you're doing it on the fly, then I hope you're using CGI.pm, and if you are I suggest outputting the table the easy way, using the Tr and td functions.

If you have a row of data in an array variable (say, @foo), you can generate table cells for that row with the statement

my $html = td (\@foo);
[download]

and the Tr function can be used similarly.

So the relevant section of your code could look something like this highly off-the-cuff and untested fragment:

my @rows;
while (<LOGFILE>) {
    my @data;
    #your routine of choice to split the input into fields 
    #and stash it in @data

    push @rows, td(\@data);
}

print table (Tr (\@rows));
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Which, as you see, makes the whole formatting question pretty much go away.

If you're not doing this dynamically, you could still use the CGI module (use CGI qw (:all -nodebug), but there are probably simpler solutions available on CPAN (try looking under the WWW section for HTML building solutions).

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If God had meant us to fly, he would *never* have give us the railroads.
    --Michael Flanders