Thanks for reply and sorry for not clear question.

You have right, chown made one error, because I received this communicate:

error: chown failed: (sniffer.log.1) at test.pl line 150
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Right now I set up the object of Logfile::Rotate like this:

my $log = new Logfile::Rotate( File   => 'sniffer.log',               
+                                               Pre => sub{close($LOG_
+FILE);},                                                             
+Post => sub{open( $LOG_FILE, '>', 'sniffer.log');},                  
+                                           Flock => 'no',            
+                                             Persist => 'no');
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The problem with chown call was solved but unfortunately I have another error:

error: could not truncate sniffer.log: Permission denied at test.pl line 151

I think that this is related to this files wrong ownership:

-rw-r--r-- 1 root    root        0 2012-01-04 20:51 sniffer.log
-rw-r--r-- 1     200     200     0 2012-01-04 20:51 sniffer.log.1
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I tried the same algorithm without packet capture and everything was ok: no errors, files were created with correct ownership