how to show perticular category posts in custome page

You can use is_category to check if the category is “members” and then load the appropriate template.

In get_template_part() use the template name for the second parameter instead of get_post_format().

In this example your template should be named “content-members.php.”

while ( have_posts() ) : the_post();

    if ( is_category( 'members' ) ) {

         get_template_part( 'content', 'members' );

    } else {

        get_template_part( 'content', get_post_format() );

    }

endwhile;