Customer security field

Hi,

I do not want that a profile see my custom field "customer" in ticket screen. It works in details, but i have 2 issues :

1. The field customer is available in header as selectable column
2. A drop down list to select a customer is available just on the top of the header, but i do not want (and i do not know why this one appears)

In both cases, the "customer" field is a reference field

Please advise

1) This version seems not to be available yet, could you please confirm ? If yes, when it should be available ?
2) When and which version please ?