Can I customize placeables with REGEX?

I was watching a lecture on REGEX and the lecturer mentioned the possibility of using REGEX to customize placeables in another CAT Tool. I was wondering if it is possible to do the same in Trados Studio as well.

For example, in Brazil we have taxpayer IDs that look a little like this 123.234.564-11. 

I can easily write REGEX to find numbers written in that format using the Filters in Studio. But if I could customize it so that Trados identifies that format as a placeable, I could just use the shortcut while translating.

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