"There are many URL's but we should not match with the string (wt)."

The following solves your problem - as stated.

$ perl -Mstrict -Mwarnings -E '
    my @urls = qw{
        https://www.abc.com.wi.pr.com/
        https://www.abc.com/
        https://www.def.com.wi.pr.com/
        https://www.wt.com.wi.pr.com/
    };

    for (@urls) {
        say unless /wt/;
    }
'
https://www.abc.com.wi.pr.com/
https://www.abc.com/
https://www.def.com.wi.pr.com/
[download]

I suspect your problem is more complex. If so, please provide more complete details of your requirements; if not, enjoy. :-)

If you do not want to match wt string directly check for unless /\.wt\./ and print.

use strict;
use warnings;
use utf8;

while(<DATA>)
{
    unless(/\.wt\./)
    {
        print "matches : $_\n";
    }
}

__DATA__
https://www.abc.com.wi.pr.com/
https://www.abc.com/
https://www.def.com.wi.pr.com/
https://www.wt.com.wi.pr.com/
[download]

Thanks. But we need it in a regex

What strange business requirement indicates that you "need it in a regex"?

...roboticus

When your only tool is a hammer, all problems look like your thumb.

Well then, I have some excellent news for you: /\.wt\./ is a regex.

Thanks. But we need it in a regex

Maybe you can write a regex

Please help me.

We already tried in

• match the urls
• Avoid a single value in the url
• URL pattern matching:
• modify a URL

Repeating your question another time in Match domain names except one is not going to work well

There is nothing in perl preventing you from using two regular expressions. Perhaps you could use the vinoth.ree suggestion to remove unwanted results that are not removed by your own regex.