Okay, that's adequate sunlight. And you're in a warm temperate zone.
You could do climbing roses, although those will want deeper roots
than you can provide in a typical container. Any chance of punching
holes in the cement slab of the yard?
For year round screening, a climbing ivy is the way to go. You don't
have too much sun for ivy. Climbing ivy in my yard hides on the shady
side of its supports, but in your yard ivy should like your side of
Your climate is mild enough you could also do climbing azaleas. They
have fairly shallow roots. You could plant in shallow stock watering
tanks. Azaleas are more or less evergreen, so would provide some
screening in winter.
Best bet, though, would be to visit some public gardens in your area
to look at vines growing there.
Stock tanks ... in the US, a common size is 1 foot tall, 2 feet wide,
and 4 or 6 feet long, with round ends. They are wonderful for use as
planters. Also common is 2 feet tall and wide, and many more lengths:
their capacity runs from 70 to 380 gallons, weight 35 to 120 pounds.