Redmine

You can create a list custom field, you'll have to maintain the list manually though.

Felix thanks for your reply.

yes I have created list custom filed. but my problem is list should be filtered automatically. for example

• project 1

• Request 1

• Task 1
• Task 2

• project 2

• Request 3

• Task 1
• Task 2
• Task 3

for the above requirement I have allocated(manually) two ID named RP1, RP3

When I defined tasks under project 1 then the system should show RP1 only..
When I defined tasks under project 2 then the system should show RP3 only..

I have created custom list field named request and assign list values RP1, RP3

After that I have define new task for project 1 in that it showing RP1, RP3 both in the Request field. but I want system should show RP1 only

Please let me know how to achieve my requirement.

Well, you could create two different custom fields with only the set of values you need in each project and show the custom field only in the corresponding project, but what you are looking for doesn't seem to be doable in core redmine without a lot of manual intervention.