Is it possible to allow exporting to excel from one of the list object, and not allow to do it from others? If I remove "send to excel" icon in properties of chart or any other object, user still can click right mouse button and select "send to excel". If I don't allow export in Document Properties, it is impossible to export fromy any object.
If you are using Qlikview then a workaround would be to layer a text box on top of the chart you want to stop users from exporting to Excel and make the text box 100% transparent then the users will not be able to right click on the table. Not a perfect solution I'm afraid but it may solve your immediate problem.