Pre-requisites:
Permission as mentioned below, on the project template in which proxy access is to be defined:
To manage the project template, 'Admin' permission assigned to you, your organization or a user group in which you are a member.
Below are the steps to assign proxy access for users in a project template:
1. In 'Projects' area, navigate to the project template where proxy access for users need to be defined.
2. Right click on the required project template and select 'Roles & Users' then select 'User Roles & Access'.
Alternately, in the thumb view, do a mouse hover on the project template thumbnail and click on 
icon. A layered page opens. Click on 'User Roles & Access'.
3. It shows the existing project roles with an ability to create new roles and assign existing or new roles to users, organizations and user groups.
4. Follow the steps as required to assign proxy users in a project (See steps 3 to step 12).
Next Article: Assign Form Permissions (in a Project Template)