In your quote, the meaning of *provide for* is *to act to prepare for something* (Wiktionary, [verb sense 2][1]). 

We may rephrase the quotation this way:

> It turns out that there are contractual answers as well: creditors can **prepare for** these possibilities in advance, not between themselves but by taking security interests in your assets—in other words, a right to take back your property directly if you run out of money. 

It is not the sense you quoted as *2.2 (of a law) enable or allow (something to be done)*.