Yes you can if you have root. My device feels faster and the amount of free ram has increased. I used DeviceControl app, I think Titanium Backup can do it as well.
I have installed both Afwall+ and Titanium backup and work properly.
But in order to get the feature of freezes an app within Titanium backup I should buy the pro version and so, before to buy it, I'm searching if there is an open source and free alternative. For instance, anyone who has tried Device Control? https://play.google.com/store/apps/details?id=org.namelessrom.devicecontrol