QA Gate - CSV multivalue

I have an attribute named IDNumbers in FIM Portal & Service. The field contain all the ID numbers that employee have separated by comma (some have just one and some two or more)

Example 1: 123456

Example 2: 234567,987654,246810

I'd like to use QA gate to ask IDNumbers field from user, but I want that users can just type one of those numbers (and it can be any of them).

If I use this to register users, they need to type the whole thing

$userTemplate.GateRegistrationTemplates[0].Data[0].Value="234567,987654,246810"

On the other hand, if I use this, users get multiple questions:

$userTemplate.GateRegistrationTemplates[0].Data[0].Value="234567"

$userTemplate.GateRegistrationTemplates[1].Data[0].Value="987654"

$userTemplate.GateRegistrationTemplates[2].Data[0].Value="246810"

Is there a way to do this so that users can type one and any of those values?