Yep, you're missing the
stock catch can.
Get a stock catch can and stock lines to go with it. I'm sure plenty of people have them laying around that they will sell you. I know I do.
Install that, and then just vent to atmosphere. You'll be okay.
If you want to go one step further, I would move the MAF to draw-through where it belongs, and run a hose from where you have the filter to before the turbo but after the MAF. That will give you a
stock setup, and you'll be golden.
If you want to get super duper paranoid, then put an additional catch can between the valve cover port and the turbo intake. Make sure it flows well and is of good quality.
Here's what I'm talking about:
http://www.sr20-forum.com/members/benfenner-albums-crankcase+ventilation-picture187-sr20det-catch-can.png
Edit: I've
just added a diagram to the thread describing this third option.