Im the owner. i have several users on my account. In 'Meetings' I can see only the list of my meetings. Is there a possibility to see in one list all set up meetings on my account? Also those set up by 'my' users?
You won't be able to see everyone's meetings in your list of upcoming meetings, unless you set up Scheduling privilege with each user on your account.
Instead, I would suggest you look at the Upcoming Events report, found in Account Management > Reports > Upcoming Events. This report is only available for admins, so your normal members would not be able to see it.