How to add group checking to Universal Post Function post function

[Hajnalka Tanczos]

I created groups in JIRA. I would like to add an universal post function where in condition I can check whether assignee is member of one of the previously created group. Any idea?

[Robert Dzido (Almarise)]

Use Workflow PowerBox and its "Condition based post function" combined with "Universal User based condition"

[Hajnalka Tanczos]

I have only the following post-functions:

Approve Gerrit Review	Perform Gerrit Review Approval
	Assign to Current User	Assigns the issue to the current user if the current user has the 'Assignable User' permission.
	Assign to Lead Developer	Assigns the issue to the project/component lead developer
	Assign to Reporter	Assigns the issue to the reporter
	Clear Field Value	Clear value of a given field.
	Copy Value From Other Field	Copies the value of one field to another, either within the same issue or from parent to sub-task.
	Create Perforce Job Function	Creates a Perforce Job (if required) after completing the workflow transition.
	Create multiple subtasks	Configure a template to create multiple subtasks when the transition is reached.
	Notify HipChat	Send a notification to one or more HipChat rooms.
	Trigger a Webhook	If this post-function is executed, JIRA will post the issue content in JSON format to the URL specified.
	Universal Post Function	Executes any post function to be executed depending on a Boolean expression.
	Update Issue Custom Field	Updates an issue custom field to a given value.
	Update Issue Field	Updates a simple issue field to a given value.

so nothing special

[Deleted user]

What do you have so far? What post-functions do you have? Have you tried the JIRA ScriptRunner? JIRA MWE? JIRA Suites Utilities?