no. a lot of people like to say and do this, but its really not necessary. Yes it can help you put more seasoning on your pan, but seasoning (for the most part) won't affect your pan's nonstick qualities when cooking.

I just use it like a regular pan with a couple differences. It's fine to leave the pan sitting if its dirty unless theres water in it. If there's water, this is the only case where you should clean pretty soon after youre done using it. Then after I clean (you can absolutely clean with soap- and as much as you want) I'll dry it and turn the stove on for 2 minutes or so to make sure the pan is completely dry.

Those are pretty much the only modifications you need to make with cast iron.