Can we do that in particular bucket their should be only one ticket for the one person in the Jira

unknown

Ideally one developer can work on one ticket at one time or 2 sometimes. So can we restrict in the JIRA that when the ticket is move from TODO bucket to In progress bucket than one user have one ticket in that bucket.

The user can' t assign 2 or more tickets and work on them 

Diogo Teles_zhgoui

Hi @[deleted]welcome to the community!

It looks like someone has already answered this question before, check out this answer.

I'll add some ideas to that answer which may make this possible for you.

Jira does not have this option, but you can create a solution that has similar effects.

One way would be to set up an automation rule triggered when the ticket is transitioned to To Do that checks how many issues are assigned to the current assignee. You can use {{lookupIssues.size}} to check number of assigned tickets, and set a compare condition that if that number is greater or equal than you limit then it transitions the issue back to the previous status and sends a comment @the author that trantisioned to To Do explaining why the status was reverted.