diff --git a/d4s_user_services_perms/README.md b/d4s_user_services_perms/README.md
index e5196064..4d0543f1 100644
--- a/d4s_user_services_perms/README.md
+++ b/d4s_user_services_perms/README.md
@@ -1,4 +1,4 @@
-Four different scenarios are covered.
+Several different scenarios are covered.
 
 1. One smartgears tomcat instance, installed inside the user's home
 2. One or more tomcat instances, each instance installed inside its
@@ -6,6 +6,9 @@ Four different scenarios are covered.
 3. One service, not tomcat based, installed inside the user's home
 4. One service, installed inside the user's home, not managed by other
    ansible playbooks (only the user is created)
+5. ACLs are used if more than one user must be able to read/write some
+   common directories or files. This works both with the gcore and the
+   smartgears cases
 
 Important note: the variable 'http_port(s)' needs to be defined earlier in the calling playbook.
 
@@ -18,3 +21,5 @@ service without using the full path
 - Installs the README file that explains where the options files are
 placed and how start/stop the service
 - The default open files limits are increased
+- Creates additional users if needed, and adds ACLS to allow them
+  access shared directories
diff --git a/d4s_user_services_perms/defaults/main.yml b/d4s_user_services_perms/defaults/main.yml
index 98f50ad6..c119abf8 100644
--- a/d4s_user_services_perms/defaults/main.yml
+++ b/d4s_user_services_perms/defaults/main.yml
@@ -7,6 +7,7 @@ d4science_user_shell: /bin/bash
 d4s_service_node: False
 smartgears_node: False
 d4s_tomcat_node: False
+d4s_additional_users: False
 gcore_node: False
 gcore_multiple_users: False
 
diff --git a/d4s_user_services_perms/tasks/d4s-basic-node.yml b/d4s_user_services_perms/tasks/d4s-basic-node.yml
index 4ef9605d..03367219 100644
--- a/d4s_user_services_perms/tasks/d4s-basic-node.yml
+++ b/d4s_user_services_perms/tasks/d4s-basic-node.yml
@@ -1,12 +1,11 @@
 ---
 - name: Create the d4science user
   user: name={{ d4science_user }} home={{ d4science_user_home }} createhome={{ d4science_user_create_home }} shell={{ d4science_user_shell }}
-  when: not gcore_multiple_users
+  when: gcore_users is not defined
   tags: [ 'gcore', 'd4science', 'users' ]
 
 - name: Create the d4science users
   user: name={{ item }} home=/home/{{ item }} createhome={{ d4science_user_create_home }} shell={{ d4science_user_shell }}
   with_items: '{{ gcore_users | default([]) }}'
-  when: gcore_multiple_users
   tags: [ 'gcore', 'd4science', 'users' ]
 
diff --git a/d4s_user_services_perms/tasks/main.yml b/d4s_user_services_perms/tasks/main.yml
index 307c3c8d..1dde899e 100644
--- a/d4s_user_services_perms/tasks/main.yml
+++ b/d4s_user_services_perms/tasks/main.yml
@@ -6,7 +6,7 @@
 - include: d4s-service-node.yml
   when: d4s_service_node
 - include: d4s-basic-node.yml
-  when: gcore_node
+  when: gcore_node or d4s_additional_users
 - include: users-data-dirs.yml
   when: d4s_users_data_directories is defined
 - include: security_limits.yml