This isn't an option that you will see in your IDX Broker control panel, but you can add a simple bit of code to the end of the widget to allow this feature.
Each agent within an IDX Broker office account has a unique ID. To locate this ID, navigate to Users -> Agents -> Manage. From this list choose the User ID of the agent whom you would like to profit from this widget.
An example widget code could look like this:
This feature is available for following widgets:
- Quick search
- Lead signup
- Lead login
- Map search
If a widget specifies an assigned agent then any property from this widget will automatically assign leads to that agent, similar to agent ID cookie functionality.