A Network Object is an Object whose methods can be invoked by other programs, in addition to the program that allocated the object.
The program invoking the method is called the Client, and the program containing the Network Object is called the Owner.
The Client and Owner can be running on different machines or in different address spaces on the same machine.
Source: https://www.cs.cornell.edu/courses/cs614/2003sp/papers/BNO93.pdf