In an image formation apparatus which receives data transmitted from plural external apparatuses connected through a network and processes the received data, transmission source lists associated with users of the image formation apparatus are stored in a memory, the transmission source list corresponding to the user authenticated with respect to the image formation apparatus is selected, it is judged, when the data is received from the external apparatus, whether or not transmission source information of the external apparatus has been registered on the transmission source list, and it is controlled based on the judged result whether or not to process the received data.