If you allow others to just ADD appointments to your calendar
and not use the "Make a Meeting" then you can use the method
below:

Open the Calendar
Select the VIEW menu
Select CURRENT VIEW
Select DEFINE VIEWS
Highlight the BY CATEGORY VIEW and
  click the COPY... button
Name the view something like (View Organizer)
Select THIS FOLDER VISIBLE TO EVERYONE
  so that others will be able to use this view also.
Click OK
Click FIELDS...

Near the bottom of the "Show Fields" window is
a box titled "Select available fields from:", Click the
arrow next to it and select "ALL APPOINTMENT
FIELDS".

Now in the Available fields box select ORGANIZER
and click the ADD button.
Move the field to the top of the list to have it be the first
   field shown in your view.
Click OK
Click OK again
Click the APPLY VIEW button

Now you will see the name of the person who was the
originator (or Organizer) of the appointment.

Use the VIEW menu to change the view on this folder
as you need it.