To check user is part of the group

[gomathyshankar]

Hi,

In the catelog activity in the work flow   we are adding the requester to the group using the script.I need to add condition to check if user was

added properly to the group.In short I need to verify the requestor is part of that group.

[Suresh Zalaki]

is there any way we can check if the selected user is part of group say A,B,C and D via business rule?