No, that is not possible (yet?)
I like the paysafecard however, and it would be an ok system.
The drawback is that if you would buy 3 paysafecards of 10 euro, you are left with 2,5 euro (~2 pounds) of non-useable money on your lfs-account.
It would be nice to introduce this system to LFS though, since it's working fine-ass.