Reading data from C4C

Hi all,

I am trying to get the list of accounts associated with particular sales person from c4c CRM. I am trying to sort it out using odata web service API's. The standard APIs bring back huge list of account(all of them) . I want to filter the result based on ownerId,but that property is not filter enabled. Can anybody suggest solution to my problem. Is it possible for us to enable filtering properties or is there any other way out?

Thanks,

Surya