A shared (or “hosted”) IPTV system including intermediate IPTV facilities controlled by a host operator and accessible to one or more hosted operators pursuant to a shared service arrangement includes a gateway adapter for intercepting and manipulating operator transactions with the intermediate IPTV facilities. The gateway adapter is operable to modify operator calls directed to the intermediate IPTV facilities to include indicia of data uniquely available to the operator initiating the calls, the data having been logically partitioned into respective subscriber groups; and to forward the adapted calls to the intermediate IPTV facilities to invoke the operator transactions. Advantageously, execution of the adapted call provides the sourcing operator access to account information of its corresponding subscriber group while restricting access to account information of other subscriber groups.