This is actually a sudo configuration issue, not a Perl question.

From the man page for sudoers:

The sudoers file is composed of two types of entries: 
aliases (basically variables) and user specifications (which specify w
+ho may run what).
[download]

You need to configure the file /etc/sudoers to specify which User-IDs may use sudo and which commands each User-ID is allowed to execute under the cover of sudo.