Need some advice about phd in computer science

Hi all

I'm currently working in iran as a IT specialist (IT Security,NetWork,Server Administration, operation system(linux)).I'm in my second year of studies towards a master in information technology management. I want to continue studies with choosing field of study into something that's at least somewhat related to IT and computer science. but my Bachelor's Degree is in another field. I have a Bachelor’s in industrial Management.Can I pursue PhD that is unrelated to my bachelor's degree major Regarding My Bachelor's Degree is in a Different Field ?

I am currently doing my master's in information technology management and planning to move on to a PhD in the same (or a very closely related) field(IT or computer science). i also have job and research Experience in the same field(IT).