Network version    
   1. Multi-user network version
   2. Functions available : a) all ; b) some according to password privileges 
   3. One write access vs. many read accesses (read = search, print, manuscript formatting, export)
   4. Many write-and-read accesses
   5. Read only version

RW: by definition an Internet network application, from several points of view:
A. databases and application are entirely web based and can be used usually on IP identification + login
B. more than one user can share the same account (login) and access the same database
-- no record locking, last save is the effective one;
C. within a site license, same person can create different authorized accounts and use different databases;
D. databases, or portions of them, can also be shared by publishing their specific URL (or only a general one) and let users search what is shared and have some, all, rights to: export , print, format a manuscript, post comments that will be notified ... etc. (no records editing though) : this function is called RefShare and it does not expect the user to run RefShare but just a browser session
E. a user can create IDs with read-only password and give it to others with this limitation

RM: (special price and conditions, see Identity card;  first control is at MS-Windows' sharing permission level;
within RM:
a) only for one user at the time when the database is opened in Read-Write Exclusive, nobodyelse can access the db until it is closed;
b)  Read-Write Share: all the logged users can perform anything apart from: Global edit, Chang db sort order, Field Type edit, Synonyms in Term Manager; 
db ca be opened in one Read-Write Share and many Read-Only Share mode; 
db ca be opened in Read-Write Share; 
db can be opened in Read-Only Share
3 4 5 are all possible different configurations, but no administrator  can control those access modes apart from Windows sharing/protection rights:  to select one type og log in is left to the user.
No record or field locking is provided: many users in Read-Write Share mode can open and modify the same record and the same field: it will be saved on the last exit from that point of view.
N.B. As already mentioned, functions like: change database sort order, global edit, field and reference type edit are reserved in Read-Write Exclusive mode to only one user, whilst others cannot access the database.