As things stand right now an IMC rating cannot be attached to an EASA licence. It will, however, be able to be attached to a UK national licence post 2012 but then will be valid only on Annex II aircraft. There are a number of opinions and promises regarding the future status of the IMC Rating and, while much work is being done to protect the privileges already earned, where EASA is concerned, nothing is assured until it has been enacted into European law. To misquote the words of Sam Goldwyn, a verbal assurance is not worth the paper it's written on.
Regarding the 'No applied instrument' restriction, the same applies - current privileges will remain valid if the FI Rating is attached to a UK national licence but then may be exercised only on Annex II aircraft. Since, at present, the IMC Rating does not exist in EASA, the only qualification for which 'applied IF' instruction is relevant is the IR and, to instruct for that an FI will have to meet the additional requirements of Part-FCL for an IRI.