I would like to have my Custom Field show up on ONLY ONE project.
**There are 2 options to make your Custom Field show up on only One project**
1) Create a Custom Field for ONLY one project
(you will not see this on any other project)
Create the Custom Field for the project (For this example, it is called Task Project, with a custom field, Task State)
2) Create a Custom Field in a Workspace, but only have it show up on ONE project
(this would be useful if you think you will want this custom field on another project in the future)
Create the Custom Field for the project Setup > Workspaces and Projects > select the workspace
Make the Custom Field Visible on Task Project