545891 wordpress network blog

Hi, This is my main blog website . [login to view URL] There will be 6 category on main website. i want a functionality to send post article to other website from main website. What I want is? I post a article from the backend of main website and choose a option from the drop down to send that article to one of these 6 website or to all. All website are on the same server. It is kind of network of blog. Main blog website will have all post and other website will have selected post. Please let me know if you can do it. I thing this can be achieve by plugin. These are the other 6 websites: [login to view URL] is the beauty college site [login to view URL] is the fitness college site [login to view URL] is the massage college site [login to view URL] is the hairdressing site [login to view URL] is the hospitality college site [login to view URL] is the professional services college Thanks