view posts from selected users, Please help

sorry to ask but i searching a long time new for a sollution to have a blog from selected users

say i have user 1, 2,3 ,4 ,5 ,6

how can i become 2 different blogs, 1 blogpage with posts from users 1, 2, 3 and another blog with only posts from users 4, 5, 6

it is not possible to work with categorys or tags for the blogpages in my project!

its my goal to insert the code in the plugin “shortcode-exec-php” and each blog with shortcode in a seperate page together with other information