Paulo,
In your hosts file, C:\Windows\System32\drivers\etc\hosts
You have:
USSIPADDRESS construdecor.com.br
And users from the construdecor.com.br domain are able to log in, correct?
If you add:
USSIPADDRESS dicico.com.br
Below the first entry, users from dicico.com.br are not able to log in, correct?
If so do they receive a specific error?
Perhaps you can capture the error in the USS Liferay log and post it?
Thanks,
Scott