You can set the desired advertising channel using .ble_advert_cfg in wiced_app_config.c file but I do not think it is possible to distinguish between the advertising channel at the receiving end (scanning). If we think of sending adv channel info in advertisement packet, I do not see any specific field for the same in wiced_bt_ble_advert_type_t or anywhere else. You can check below thread for reference:Re: scan channel mask
Which device you are using? I came across following thread but the implementation is for PSoC devices: Can I scan advertisements on only one channel?