You click on the options button, and then You see a look like this.
What will be shown - and if the options button will be shown, depends on the settings You have done.
Remember that the appearence of many things, depends on the settings.
The user selection is only available to users logged on, You will therefore not see it here on those pages.
Download the program, install it and then discover the full potential in it.
Users can be selected by :
Either check "All users"
Check out the wanted Users ( multichoice)
When selection is done, You click "done", and You are back to the calendar.
You now, only see the events that have an event owner/user that belongs to one of the selected users.