Can my employer prevent me from getting a new job in UAE by imposing travel ban?

Dear Sir,

Currently, I am working as a production supervisor in Kuwait and recently I have resigned from my job. The reason was - I got a better offer from the UAE.

My current employer tried to convince me to stay here but I refused for some reasons. Now he is threatening me like "You can't move to UAE because I am going to ban your UAE travel".

Please advise me, is it possible to ban my UAE travel without any valid reason? If they made any reason what would that be?