Default [Q] Skip track with volume buttons while screen OFF only for my third party music app

Hi all,

Would like to know if someone know how to make this possible :

I have 2 music apps on my galaxy S3 LTE running TGP ROM v18.10 (stock-based ROM android 4.3). I want to install an app or anything else that allows me to skip track with volume buttons while screen is OFF ONLY FOR my 3rd party app (Deezer) AND NOT for the sammy stock music app.
I tried many diffrent ways like xposed modules but with each apps it doesn't work or it skips songs on both 2 apps at the same time which make me also display the music contol widgetof the sammy app on the lockscreen.
Any help would be hightly sappreciated !