1. A non-transitory computer-readable storage medium having a computer program stored thereon and readable by a computer of a communication apparatus connected to a network including a plurality of image processing apparatuses, the computer program, when executed by the computer, causing the communication apparatus to perform operations comprising: searching the plurality of image processing apparatuses in the network; obtaining processing information being related to execution of image processing configured to be executed by each of the plurality of image processing apparatuses and is prepared for each of the plurality of image processing apparatuses; determining a plurality of executable image processing, which can be executed by the plurality of searched image processing apparatuses, by using the processing information, the plurality of executable image processing including complex processing that is configured to be executed by a first image processing apparatus configured to execute first image processing and a second image processing apparatus configured to execute second image processing by using data obtained by executing the first image processing; and displaying first support information, which is for selecting an image processing from the plurality of executable image processing, on a display unit of the communication apparatus, the first support information being a first list showing information indicating a name of each of a plurality of image processing including the complex processing which can be executed within the network displaying, when an image processing is selected from the first list, second support information, which is for selecting one or more image processing apparatuses which can execute the selected image processing, on a display unit of the communication apparatus, the second support information being a second list showing information indicating names of the plurality of image processing apparatuses; and transmitting, when the one or more image processing apparatuses are selected from the second list, a request for executing the selected image processing to the selected image processing apparatus.