but How can I use this variable in my template process

You could put it in your $data hash: 

$data->{username} = ...;

...
$template->process(\*DATA, $data, $filename)

...

\issuedby{[% username %]}

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In reply to Re^3: How to get system user name from windows using perl by Eliya
in thread How to get system user name from windows using perl by veerubiji

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