FHA Restriction rule???

[Michael Solomon]

I was talking to my lender yesterday about refinancing out of my Fha loan after I buy my first multifamily property to a conventional loan. So that I can use the fha loan again to finance my next purchase. He tells me that I won't be able to use an fha loan again on a property within 40 miles of each other. I haven't found any evidence of this. 

Has anyone else heard of this rule?

Any help is appreciated, thank you.