He used computers and the internet to perpetrate the bank fraud. It's not uncommon to see such restrictions on criminals.
I guess I was applying the First Amendment in its most basic element: Freedom to express political and social ideas and thoughts. I found it hard to believe that expressing one’s political ideas would be prohibited by having a conviction for bank fraud. Now, however, I see that prohibiting his use of a computer while on probation does make some sense, as apparently he did use the internet to commit the fraud. So, it that respect, his First Amendment rights are still inviolate, but his means of expression have been curtailed somewhat.