are you trying to disable the control for specific users?
Another approach might be to add your users to a new SharePoint group. Afterwards you place a rule on your control which is:
fn-DoesMemberExistInAudience(current user, your new groups name)
The inline function will check if the current user is in the group specified. If true you can disable/hide the control. The method is an inline function. Rules will only show you runtime functions so you will have to copy/write the function's name itself but they do work flawless in rules and also mobile apps so you should give it a try.