Yes, if you are an international or recreational team you can import any meet results that include your team club code, regardless of what the LSC/Region/League code is in the results file. Once imported, the league code will be set to whatever your LSC/Region/League code is. This can be seen in the Team Profile page under the "Organization" heading.
If you are a USA Swimming team that is encountering problems with importing meet results because of a conflict in the LSC/Region/League code please contact Support for more information.