Prism Event Aggregator using Tab Control with common User Control

Question

I am using Prism Event Aggregator to communicate between loosely coupled components (in my WPF application). In my Main View Model I am publishing the event IndexUpdateValueEvent:

this.iEventAggregator.GetEvent<IndexUpdateValueEvent>().Publish(name);

I have a Tabcontrol with several tabs, each containing a IndexView user control. In my IndexView Model (with is the data context of the IndexView) I am subscribing to the same event (IndexUpdateValueEvent) which will update in the IndexView Properties from the respective View Model using the method UpdateValues:

this.iEventAggregator.GetEvent<IndexUpdateValueEvent>().Subscribe(UpdateValues);

Since the TabControl has several IndexView UserControls (one per Tab) then all IndexViews will have its Properties changed (the method UpdateValues will be executed for all usercontrols throught the Event Aggregator publish/subscribe from the view model). Can I make the subscribe event in the index viewmodel only execute the action (UpdateValues Method) in the active Tab Header of the Tab control?

Can I introduce a condition using the EventAggregator publish/subscribe events, so that when using the same UserControls only one User Control gets updated (throught the user control's view model)?