limiting only one app to use data Is there any way so that I can limit only one or two app to use my data in android 4.4.2.

PS:-  I know about blocking background data but I am curious about any other way.
If you want to turn off cell data on specific apps, just uncheck the box that corresponds to  connectivity and you are all set. The Android apps that allow you to do this are as follows some firewall apps.

https://play.google.com/store/apps/details?id=com.jianjia.firewall

https://play.google.com/store/apps/details?id=com.googlecode.droidwall.free

find more app from playstore for firewall apps .