[support] Restrict access on user/* "by role"

[Francesco Baldini]

I need to create a block with some data on profile page user/*

I created 3 Views blocks, each block has to be shown on user's page by role

The site has 3 roles:
Role-0 higher with block-0
Role-1 middle with block-1
Role-2 lower with block-2

Role-0 users have to have a block-0 block on their profile page (user/3,
user/7, user/15, etc)

Role-1 users have to have a block-1 block on their profile page (user/4,
user/8, user/19, etc)

Role-2 users have to have a block-0 block on their profile page (user/5,
user/11, user/35, etc)

in two words each Role has its own block but have not to be shown on
others roles' page

if I visit user/3 I have to see block-0 only
if I visit user/4 I have to see block-1 only
if I visit user/5 I have to see block-2 only

I tried to restrict access by role but now Role-0 can see 3 blocks on the
same page, some empty some filled, etc..

any idea?