If you want something not too rampant (or can be contained with pinching) , but will tolerate less than full sun, I'd suggest;
Solanum laxum - white potato vine
Manettia inflata
Clerodendrum thomsonae
pink Allamanda .
Stephanotis and hoya are options but not terribly dense.
In terms of annuals or tender perennials, there are a number. I really like the clitorea double vine and moonflower - Calonyction

I found on Saturday a Jasminum officinale in the markets for 5E so I bought it. Not sure how will it do with just morning sun and bright light the rest of the day.

The Mexicane Flame vine is evergreen and blooms year round here in FL, zone 10a. I grew mine in a pot so it should do well on a balcony. Butterflies love it and the red/orange bloom is so bright. See my post here.
http://forums.gardenweb.com/forums/load/vines/msg0910180225997.html?12

Here is a link that might be useful: Mexican Flame Vine