Play with the stroke options in styles. You can make multiple strokes. You can also just do it in AI and bring it into PS. They are different apps with different purposes and they play very nicely together.
Photoshop doesnot have an offset option for stroke layer style, so you need to do multiple strokes as Melissa mentioned. You can set stroke opactity to 0% if needed (the black stroke in my example is transparent.
If you have any more questions please be more specific and inculde a screenshot, so we can understand you better.