Hello,
I wanted to know that can I control 4 DC motors wirelessly through Hobby King 2.4Ghz 4Ch Tx & Rx V2 (Mode 2) using 2A L298 based Motor Driver .

2A L298 based Motor Driver   http://probots.co.in/index.php?main_page=product_info&cPath=54&products_id=197
Hobby King 2.4Ghz 4Ch Tx & Rx V2 (Mode 2) http://www.hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=9042
                                                            http://rchobbyaddict.com/product_info.php?cPath=22&products_id=142       

No, Both protocol is different.
You have to use ESC for any DC Motor driving by the RF Tx/Rx.
Else you have to use interface card between the Rx and Motor Driver card.

And the driver can drive only upto 4A, but upto 40 volt whereas ESCs are used for Higher currents (Brushed or brushless) for relatively lower voltages. So, the Motor to be used, needs the supported driver and power supply.

Always keep in  mind, LOAD IS THE KING and so calculate from Load to the source.

Thanks