How to restrict Customer Sites based on Operating Unit in the 'Current Location' region, while creat

Hi All-

Is there any way we can restrict Customer Sites with respect to Operating Unit (of the responsibility) while creating Instance.

Specifically- when we choose Current Location > Type = Party Site >  Party Name > Party Number > Site Number.

• Responsibility: Asset Tracking Super User

Menu: Asset Tracking Root Menu

• Following profile options set at Resp. level

MO: Default Operating Unit = X

MO: Operating Unit = X

Also, I have found that, CSI: Operating Unit Restriction and/or CSI: Forms To SSWA Default Responsibility .... these are more of restricting Item Instances itself and not works well for restricting customer sites based on OU.

If anyone has come across such issues, please help.