Yes, you can convoy raid several territories that border the same sea zone with a convoy symbol. In the example above, an axis warship could convoy raid the UK for Egypt and Trans-Jordan then later convoy raid France for Syria (that is of course if Paris was back under French control).
Think about sea zone 97. That sea zone borders Southern Italy, Northern Italy, Yugoslavia, Albania and Greece. So there is a possibility of 12 IPCs to be convoyed there if you have enough Allied ships and/or subs to do the job. Also, if Germany took Yugoslavia and/or Greece, you get to convoy raid on Germany’s turn as well as Italy’s.