multiple cron info from various users

Hi

I have this output of watchdog after enabling poormans cron
Is it ok? I don't know why there is sometimes anonymus and sometimes some user name, if poormans cron is run by drupal.
I have set poormans cron to run each 5 minutes.

cron	14 Júl 2009 - 09:08	Cron run completed (via poormanscron).	Anonymous
cron	14 Júl 2009 - 09:08	Cron run completed.	Anonymous
cron	14 Júl 2009 - 09:08	Cron run completed (via poormanscron).	Anonymous
cron	14 Júl 2009 - 09:08	Cron run completed.	Anonymous
cron	14 Júl 2009 - 09:03	Cron run completed (via poormanscron).	Martina1	
cron	14 Júl 2009 - 09:03	Cron run completed.	Martina1	
cron	14 Júl 2009 - 09:03	Cron run completed (via poormanscron).	admin	
cron	14 Júl 2009 - 09:03	Cron run completed.	admin	
cron	14 Júl 2009 - 08:58	Cron run completed (via poormanscron).	admin	
cron	14 Júl 2009 - 08:58	Cron run completed.	admin	
cron	14 Júl 2009 - 08:58	Cron run completed (via poormanscron).	Anonymous
cron	14 Júl 2009 - 08:58	Cron run completed.	Anonymous
cron	14 Júl 2009 - 08:58	Cron run completed (via poormanscron).	Anonymous
cron	14 Júl 2009 - 08:58	Cron run completed.	Anonymous

thanks
Igor
http://www.somvprahe.sk