Assuming white space separated user input, what's wrong with using split to auto-split the user input, giving:

while (<STDIN>){
    File::Find::find({wanted => \&wanted}, split);
    exit;
}
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??

Is it just me or am I missing something (coz it's stupid o'clock here) ?? Coz it strikes me that exit in the loop is preventing you reaching your goal since even if the user entered a number of paths, the exit would cause the loop (and indeed the program) to terminate once the first (set of) path(s) has been processed - remove the exit and get the user to just enter <CTRL><D> to end the list and thus the program.