Index: app/models/issue.rb
===================================================================
--- app/models/issue.rb  (Release 1.0.4)
+++ app/models/issue.rb
@@ -15,6 +15,8 @@
 # along with this program; if not, write to the Free Software
 # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 
+# Comments by akb
+# ToDo: check against permission_manage_issue_assignment
 class Issue < ActiveRecord::Base
   belongs_to :project
   belongs_to :tracker
Index: app/models/query.rb
--- app/models/query.rb  (Release 1.0.4)
+++ app/models/query.rb
@@ -274,9 +274,12 @@
     label ||= field.gsub(/\_id$/, "")
   end
 
+  # @arnekolja
+  # Total rewrite to reject not allowed column. Only last line is still the same.
   def available_columns
-    return @available_columns if @available_columns
-    @available_columns = Query.available_columns
+    @available_columns = (@available_columns) ? @available_columns : Query.available_columns
+    @available_columns.reject! {|c| c.name == :assigned_to} unless User.current.allowed_to?(:view_issue_assignment, @project)
+    
     @available_columns += (project ? 
                             project.all_issue_custom_fields :
                             IssueCustomField.find(:all)
Index: app/views/issues/_attributes.rhtml
--- app/views/issues/_attributes.rhtml  (Release 1.0.4)
+++ app/views/issues/_attributes.rhtml
@@ -8,7 +8,13 @@
 <% end %>
 
 <p><%= f.select :priority_id, (@priorities.collect {|p| [p.name, p.id]}), {:required => true}, :disabled => !@issue.leaf? %></p>
-<p><%= f.select :assigned_to_id, (@issue.assignable_users.collect {|m| [m.name, m.id]}), :include_blank => true %></p>
+<% if User.current.allowed_to?(:manage_issue_assignment, @project) -%>
+  <p><%= f.select :assigned_to_id, (@issue.assignable_users.collect {|m| [m.name, m.id]}), :include_blank => true %></p>
+<% else %>
+  <% if User.current.allowed_to?(:view_issue_assignment, @project) -%>
+    <p><label><%=l(:field_assigned_to)%></label><%= @issue.assigned_to ? link_to_user(@issue.assigned_to) : "-" %></p>
+  <% end %>
+<% end %>
 <% unless @project.issue_categories.empty? %>
 <p><%= f.select :category_id, (@project.issue_categories.collect {|c| [c.name, c.id]}), :include_blank => true %>
 <%= prompt_to_remote(image_tag('add.png', :style => 'vertical-align: middle;'),
Index: app/views/issues/show.rhtml
--- app/views/issues/show.rhtml  (Release 1.0.4)
+++ app/views/issues/show.rhtml
@@ -25,7 +25,9 @@
     <th class="due-date"><%=l(:field_due_date)%>:</th><td class="due-date"><%= format_date(@issue.due_date) %></td>
 </tr>
 <tr>
-    <th class="assigned-to"><%=l(:field_assigned_to)%>:</th><td class="assigned-to"><%= avatar(@issue.assigned_to, :size => "14") %><%= @issue.assigned_to ? link_to_user(@issue.assigned_to) : "-" %></td>
+    <% if User.current.allowed_to?(:view_issue_assignment, @project) -%>
+        <th class="assigned-to"><%=l(:field_assigned_to)%>:</th><td class="assigned-to"><%= avatar(@issue.assigned_to, :size => "14") %><%= @issue.assigned_to ? link_to_user(@issue.assigned_to) : "-" %></td>
+    <% end %>
     <th class="progress"><%=l(:field_done_ratio)%>:</th><td class="progress"><%= progress_bar @issue.done_ratio, :width => '80px', :legend => "#{@issue.done_ratio}%" %></td>
 </tr>
 <tr>
Index: lib/redmine.rb
--- lib/redmine.rb  (Release 1.0.4)
+++ lib/redmine.rb
@@ -67,6 +67,8 @@
     map.permission :add_issues, {:issues => [:new, :create, :update_form]}
     map.permission :edit_issues, {:issues => [:edit, :update, :bulk_edit, :bulk_update, :update_form], :journals => [:new]}
     map.permission :manage_issue_relations, {:issue_relations => [:new, :destroy]}
+    map.permission :manage_issue_assignment, {} # @arnekolja
+    map.permission :view_issue_assignment, {} # @arnekolja
     map.permission :manage_subtasks, {}
     map.permission :add_issue_notes, {:issues => [:edit, :update], :journals => [:new]}
     map.permission :edit_issue_notes, {:journals => :edit}, :require => :loggedin