LM317LM as a current source
Figure 1. The 8-pin package from page 3 of the datasheet.

Since there is only one ADJ pin you hopes are dashed. It's one LM317 inside with VOUT connected to four pins. They'd be labelled differently otherwise.

There are a couple of other clues:


There's only one ADJ pin. You can only set one voltage / current.
To do what you were hoping for you'd need 4 &times; ADJ, 4 &times; VOUT and VIN. That's nine pins, the chip only has eight and two of them are NC (not connected).


Sorry.