signup and two different logins

Hello,

I am a web developer and I am new to wp. I want to create a signup form and two different login for different roles that will redirect to different pages. I can do this without wordpress but how to do this in wordpress. I am not sure how to use sessions in wordpress plugins. If this is not possible with wordpress, can i copy and paste normal php codes into wordpress site?

If anybody can reply, please answer.

Thanks in advance.